8 x 42 vs 8 x 32; Which is More Versatile?

Two good binoculars: The Barr & Stroud Savannah 8 x 42(left) and the Celestron Trailseeker 8 x 32(right).

Many binocular enthusiasts will often recommend a good 8 x 42 as the near perfect all-round instrument for birding, hunting and astronomy. This recommendation seems sensible enough given their medium size, weight and decent light gathering power for use in bright daylight, low light conditions and stargazing. But the increasingly popular compact 8 x 32 has also earned a respectable place in the hearts of many birders and sightseers owing to its lighter weight but greater light gathering power over a pocket binocular. But that raises an interesting question; which model is more versatile in the long run?

To begin to answer that question, I’ve spent some time comparing and contrasting the efficacy of two binoculars in these size classes; a Barr & Stroud Savannah 8 x 42, which I have written enthusiastically about in a past blog, and more recently, a Celestron Trailseeker 8 x 32, described in more detail here.

Let’s first look at the specifications of both models at a glance:

The Barr & Stroud 8 x 42

Fully multi-coated

Phase coated(probably silver or enhanced aluminium)

8.2 degree FOV(143m@1000m)

5.25mm exit pupil

18mm eye relief

Dry nitrogen purged

Waterproof

810g

Retail Price: £120 UK

The Celestron Trailseeker 8 x 32

Fully broadband multi-coated

Phase coated(high reflectivity dielectric coatings)

7.8 degree FOV(137m @1000m)

4mm exit pupil

15.6mm eye relief

Dry nitrogen purged

Waterproof

453g

Retail Price: £125(recently reduced for clearance owing to the discontinuation of the model)

Performance in Bright Daylight Conditions

Both instruments serve up  very sharp, high contrast images of well-illuminated targets with virtually no chromatic aberration(this is widely exagerrated by many reviewers but is actually not really an issue in any realistic situation. Indeed, in my comparison of smaller high-quality ED and non-ED instruments there has never been a target that I have imaged where ED glass made any meaningful difference to the viewing experience). The Celestron has a narrower field of view and a smaller ultra-sharp sweetspot. The Barr & Stroud displays a wider, flatter field with a noticeably larger sweetspot. The larger exit pupil on the latter makes viewing that little bit more comfortable, since positioning the eye over a larger shaft of light is easier to achieve. Both instruments generate images that are about equally bright under these conditions though. Near equal too is their ability to suppress glare and internal reflections owing to good baffling and high-quality coatings applied to all optical surfaces. The objective lenses are also deeply recessed in both binoculars, offering protection against rain, wind-blown dust, as well as serving as an effective barrier against peripheral glare.

I also noted slight differences between these instruments in colour tone when observing brightly illuminated daylight targets. The Celestron had a more neutral colour tone, whereas those of the Barr & Stroud were ever so slightly yellower and darker in comparison.

The focusing wheels on both instruments are notably different in field use however. The Barr & Stroud possess one of the best focusers I have personally experienced(indeed they have been very good in a number of other instruments marketed by the same company). It is buttery smooth and very easy to adjust in situations where rapid changes of focus are necessary. The Celestron focuser has much more tension in comparison, even after using it for a considerable number of hours in the field. When rapid focusing is required, the Barr & Stroud Savannah is clearly superior, which makes a significant difference when scanning fast-moving targets like birds flying across the field of view.

There is also a significant difference in eye relief between the two instruments. The Barr & Stroud has a whopping 18mm eye relief whereas the Celestron Trailseeker only exhibits 15.6mm in comparison. What this means in practice is that the latter is far more comfortable to use while using eyeglasses. I can see the entire field of the Savannah if I use my eyeglasses but it’s a lot more challenging with the Trailseeker.

The weight difference between the models is considerable however; with the Celestron tipping the scales at just over half the weight of the Barr & Stroud. Indeed the latter is one of the heaviest  8 x 42s currently available, while the Celestron Trailseeker is one of the lightest models in its aperture class. This has a significant  bearing on  prolonged use and transport in the field, where neck strain is effectively eliminated in the light-weight Celestron.

Low Light Performance

On paper, one would reasonably expect that the significantly larger 8 x 42 would prove better in low light conditions, such as those experienced at dawn and dusk, but my testing revealed some surprising results! In a nutshell, the Celestron Trailseeker proved to be much closer to the Barr & Stroud under such conditions! Immediately after sunset on several late January evenings, I found that both instruments produced very similar performance in terms of the brightness of the images garnered of a heavily lichen-adorned tree branch located some 50 metres off in the distance. Indeed, the 8 x 42 only pulled noticeaby ahead well into twilight when the last light of day was ebbing from the landscape. This seemed genuinely puzzling to me, as I fully expected the results to be well, like night and day.  But why though?

The first significant difference between the models relates to the coatings used on the roof prisms in both instruments. The Celestron Trailseeker has state-of-the-art dielectric coatings that significantly improve its light transmission over a similar sized model with lower reflectivity aluminium or silver coatings. Maybe the Trailseeker has better anti-reflection coatings applied to the lenses making up the objectives and the eyepieces? The second thing that I noted is the significantly larger frame of the Barr & Stroud Savannah, which will have commensurately larger prisms than the smaller Celestron, with the implication that more light will be absorbed while traversing the former. That said, I still couldn’t understand why an instrument with 42mm objectives was not pulling very far ahead under such low light conditions than an instrument with only 32mm aperture objectives. Quite frankly, it still didn’t add up!

It was then that I realised that the best explanation possibly pertained to the size of the exit pupil under the same conditions. As any amateur astronomer worth his/her salt will tell you, the pupil of the eye is designed such that it dilates in low light conditions to allow more light to reach the retina. Indeed, this is one of the ABCs in telescopic deep sky observing, where a fully dilated eye pupil shows you much fainter objects than eyes that are newly accustomed to the dark. But while some dilation certainly occurs under low light, I wondered whether there was a limit to how much dilation actually occurs during early twilight, when the differences were observed to be most similar in both instruments. If my eyes only extended from say 2.5mm during bright daylight to a liitle over 4mm in early twilight, the extra millimetre or so offered by the 8 x 42 would be of no significant benefit. Maybe my eyes were just not capable of using the 5.25mm offered up by the larger 8 x 42 under such conditions?

I also noted that the tests on both binoculars were carried out more or less simultaneously for the duration of about 15 minutes, so not long enough to induce big changes in the ratio of rhodopsin(which reaches higher concentrations in darker conditions) to retinal(which exhibits higher concentrations in bright light conditions) In addition, the eye takes quite a long time to effect these biochemical changes, and most certainly longer than the 15 minute duration over which these tests were conducted. Moreover, rhodopsin is still rather labile even in low light conditions such as those encountered during the twilight sessions. However, these findings were quite in keeping with the subsequent experiences I had with both binoculars under well-adapted dark conditions; specfically under a clear night sky with no Moon.

Dark Sky Performace Compared

Donning some dark sunglasses I sat out in a deck chair for about 25 minutes after leaving a bright indoor environment to accelerate dark-eye adaptation. By then I was sure that my eye pupils had dilated to their maximum extent and the process of rhodopsin biosynthesis was well under way. Examining the region centred on Orion’s belt stars, I immediately noted a very significant difference between the glasses; this time the clear winner was the 8x 42 Barr & Stroud binocular. It was easy to see that it was pulling in more numerous and fainter stars in Collinder 70 than the smaller 8 x 32. The same was true when I critically examined the Sword Handle of Orion, and in particular, the marvellous gaseous nebula of M42. The 8 x 42 was very much superior, indicating that my eyes were indeed gathering in more light( as they should do) owing to its larger exit pupil of the 8 x 42 binocular.

That said, the 8 x 32 was more comfortable to hold over prolonged periods(several minutes), owing to its much lower weight and transmitted a surprising amount of light; far more than any pocket glass (25mm aperture or less) I had recalled from memory, yielding quite impressive views of star fields and open clusters like the Auriga Messier trio, then very high overhead in the winter sky. The slower focus wheel on the Celestron was far less of a problem under these viewing conditions owing to the relatively tiny focus adjustments required when viewing astronomical targets, and especially when moving from the zenith to objects imaged nearer the horizon.

Overall Implications

The Barr & Sroud Savannah 8x 42(left) gets my winning vote over the Celestron Trailseeker 8 x 32(right).

So which instrument is more versatile? Unsurprisingly, this is a deeply personal choice and, as such, there are no absolute answers. If you don’t mind carrying around the extra weight, then the 8 x 42 would get my vote. I just love the way the instrument feels in my hands, its solid, Spartan construction, wonderfully sharp, super-wide field of view and spectacular bang for buck. The 8 x 42 is exceptionally easy on the eyes with its very comfortable 18mm eye relief(compared to the considerably tighter 15.6mm on the Celestron) and larger exit pupil, so pulling well ahead as an astronomical instrument, or when glassing under deep twilight conditions. It’s only significant downside over the 8 x 32 is its lack of dielectric coatings on the Schmidt-Pechan roof prisms, but it more than makes up for this with its fine optical quality and sturdy mechanical design. Indeed, the 8 x 42 Savannah remains this author’s personal favourite binocular!

But if weight is a big issue and you like to do all or nearly all of your glassing during daylight hours, then a high-quality 8 x 32 will certainly deliver the readies and thus deserve serious consideration.There are some other models in this binocular size class that are as good, if not better than the Celestron, and at prices that won’t leave you out in the cold; the Vortex Diamondback HD 8 x 32(with its famous ‘no questions asked’ VIP warranty), the Nikon Monarch 7( 8 x 30) and the Hawke Frontier X HD, immediately come to mind, all of which retail in the UK for between £200 and £300 and well worth checking out. If possible, you should try before you buy to avoid disappointment.

 

Thanks for reading!

 

Neil English is the author of several books on telescopes and astronomical observing, but does not endorse bling. He is seriously considering writing a similar text dedicated to binoculars in the future.

PostScriptum: I intend to have my fully dilated eye pupil size measured on my next visit to my optician.

De Fideli.

Product Review: Leica Trinovid BCA 8 x 20.

To establish ‘Limes.’

Back in the summer of 2019, I got the opportunity to test out a very high quality Swarovski EL Range 10 x 42 owned by a fellow villager named Ian. A keen hunter, he uses this binocular to seek out red deer and estimate their distance using the built-in laser telemetry in the instrument. A few weeks ago, I bumped into Ian in the swing park near my home, where he was looking after his young grandaughter, and we struck up another conversation about binoculars. I was returning from one of my walks,  carrying along my little Zeiss Terra 8 x 25 pocket. He was fascinated with this new instrument, being duly impressed with its razor sharp optics, generous wide field, light-weight ergonomics and decent market value. It was then that I discovered that Ian was also the proud owner of a little Leica Trinovid BCA 8 x 20, which he purchased about two years back for casual sightseeing during his summer vacations in the Scottish northwest. Keen to expand my portfoIio of tested instruments, I asked him if he would be kind enough to let me borrow it  for a wee while to evaluate its optical and mechanical performance. He agreed, but did say that he found the Terra to be very comfortable to use and was even considering acquiring one in the future! Fast forward a couple of weeks and Ian dropped by the Leica binocular at my home so that I could begin some tests, the results of which, I will divulge in this blog.

Leica is a German optical firm that has established itself as a world-leading manufacturer of high-end cameras, microscopes, camera lenses, binoculars and spotting ‘scopes for the burgeoning sports optics market. Founded in 1869 by Ernst Leitz, at Wetzlar, Germany, where the original factory remained until 1986, after which time production was moved to the town of Solms to the west of Wetzlar.  In 1973, Leitz set up another large factory in  Portugal, where it has remained to this day. With 1800 employees, Leica has an annual turnover of the order of 400 million Euro, and continues to produce state-of-the art optical equipment for private and public institutions(mostly universities and hospitals) the world over.

The Leica Trinovid line of binoculars has a long history. Leica first began to manufacture high-quality binoculars back in 1907, but the Trinovid line first appeared in 1953. Over the years, Leica has continued to develop their Trinovids, adding new optical technologies to their products where, today, they utilize some of the best glass and optical coatings available.

First Impressions

The quality of the device was immediately apparent to me as I prized the 8 x 20 from its somehwat oversized, soft carry case. Weighing in at just 235g, the Leica Trinovid BCA 8 x 20 measures just 9cm long, 6cm wide and 3.5cm deep when folded up. This makes it one of the smallest and most portable binoculars in continuous production today.

The Leica Trinovid BCA 8 x 20(made in Portugal) folds up into a tiny storage unit just 9cm long and 6cm wide. Note the unusual location of the right eye dioptre setting, which is accessed by turning the objective lens housing.

The binocular has a very traditional dual-hinge system but maintains a very classic look and feel, with an aluminium frame. Unlike their larger binoculars, the BCAs are described as ‘splashproof’, meaning that they will work fine in rainy conditions but are not hermetically sealed or dry nitrogen purged like the majority of roof prism binoculars today. The all-metal chassis is overlaid by a tough rubber armouring, which greatly improves its grip during field use and affords greater protection against accidental bumping or knocking about.

The strong and durable rubber armouring overlaying the aluminium chassis of the Leica Trinovid BCA 8 x 20.

The eyepieces are of exceptionally high quality, being made of metal overlaid by soft rubber cushions for comfortable viewing. They offer just two positions; fuly extended upwards for non-eyeglass wearers(including yours truly) or fully retracted when used with glasses. Eye relief is pretty tight though, at just 14mm, so some eyeglass wearers may struggle seeing the full field. The eyecups hold their position very well and can only be retracted by using considerable downward force. I must say that these are the finest eyepieces I have thus far experienced in my survey of the binocular market. Simply put, they are beautifully designed.

The beautifully designed eyepieces click rigidly into place.

Intriguingly, the dioptre setting(+/-3.5) is located on the right objective lens, which turns either clockwise or anti-clockwise. The focus wheel, which appears to be constructed of a hard plastic, is quite small but moves very smoothly with zero backlash. At first, it’s a bit fiddly to use but with a little practice becomes easier to negotiate, though it may present problems to those who wear gloves.  All in all, the binocular is a study in elegant design. Clearly it was created not only to look good but to feel good in active service.

The Trinovid BCA has a high-quality, somewhat elastic, neckstrap, which is affixed via clips, so can be disengaged from the binocular if so desired. It is comfortable to use. Yet again, an unusual but very nice touch.

The objective lenses are not very deeply recessed in this model, perhaps because its designers aimed to minimise the length of the instrument. Having more deeply recessed objectives serves a number of useful purposes though, including protection against rain and dust, and serving well as an effective barrier against peripheral glare.

The objective lenses on the Trinovid are not very deeply recessed.

Optical Testing

As is customary for me with the arrival of any new binocular for testing, I began by assessing its performance in suppressing stray artificial light, internal reflections and glare. This is easily done by sharply focusing on a bright internal light source – I use my iphone torch at its brightest setting – in a darkened room and sharply focus on the light. Such tests quickly revealed highly satisfactory results. Stray light was very well controlled and very clean, with only very minor internal reflections and no sign of diffused glare often encountered in lesser models. The main artefact was a reasonably pronounced diffraction spike. Indeed, using two small ‘control’ binoculars; my Zeiss Terra 8 x 25 pocket and my recently acquired Celestron Trailseeker 8 x 32 (both of which exhibit excellent performance in this regard), I judged the Leica 8 x 20 to be as good, if not a little better, than my controls. All of these binoculars employ full, broadband multi-coated optics on all glass surfaces, with prisms that are dielectrically coated for highly efficient light transmission. The results predict that the Leica will perform excellently when pointed at strongly backlit daylight scenes, bright street lights and bright terrestrial targets like the Moon. There is no such thing as absolute perfection though. Such a complex optical device will always betray some degree of imperfection under these very stringent tests. I guess, it just comes with the territory!

The high quality HDC coating makes for exceptional light transmission.

In good accord with my flashlight tests, pointing the little Trinovid at a bright sodium street light at night showed no internal reflections, glare and only a very faint diffraction spike that I didn’t find intrusive. These tests were followed up by daylight optical assessments. Looking at tree trunks and branches during bright afternoon conditions showed that this 8 x 20  has excellent optics with a good, wide field of view. The image is tack sharp with a very large sweet spot. There is only slight softening of the images in the outer 10 per cent of the field. Colours are true to form and I detected only the merest trace of chromatic aberration and then only by looking very hard for it(I honestly find this activity rather pointless) on difficult targets. Contrast is exceptional with excellent control of stray light, as judged by imaging targets nearby a setting Sun under hazy sky conditions. There is a normal level of veiling glare which can be removed by blocking the Sun with an outstretched hand. There is also some minor pincushion distortion at the edge of the field but I still judged this to be well above average.

Excellent coatings make the objectives almost disappear.

Some readers will be surprised to learn that Leica did not employ any ED elements in the objective lenses of their BCA binoculars, proving once again that such an addition is not at all necessary to create an excellent optic(the Swarovski CL pocket and larger sibling, the CL 8 x 30 Companion are yet other examples). What really matters are well figured glass elements with high-quality anti-reflection coatings. Looking up its specifications online showed that Leica has spared no expense applying their famous(patented) High Durable Coating (HDC). It purports to be abrasion-resistant with enhanced light transmission, and then there’s the solid P40 dielectric phase coating applied to the Schmidt-Pechan roof prisms. What results is a highly efficient light gathering optic; an especially important commodity for tiny binoculars like these.

The Trinovid certainly delivers optically when the light is good and strong. But it does have some issues which are important to address. Because of its very small size, it’s actually quite challenging to hold steady during field use. It’s small exit pupil (2.5mm) also makes it considerably more difficult to position one’s eyes correctly compared with slightly larger binoculars, such as a good 8 x 25( with a 3.125mm exit pupil). Comparing its ergonomics with my Zeiss Terra 8 x 25 pocket glass showed that the Terra was simply much easier to engage with even though it’s only about 30 per cent heavier(310g). It’s larger frame also gives it the edge in terms of acheiving a good, stable image. This could prove important if the owner intends to use the 8 x 20 BCA for prolonged glassing periods, as the extra effort incurred in accurately positioning one’s eyes over the small exit pupils may induce eye strain with some users, so I think it’s important that people seriously considering this tiny glass try the more popular 8 x 25 units out before making that all-important purchase. Indeed, I believe this point was not lost on Ian when he tried the Terra out in the swing park that afternoon.

In an ongoing blog on using my 8 x 25 binos, I gave mention to why I think good pocket binoculars are quite expensive in the scheme of things. I attributed this to the extra difficulty in accurately positioning the many optical components stably within a scaled-down structure. The Leica Trinovid BCA 8 x 20 seems to follow this rule of thumb. It is smaller than any 8 x 25 model but is also more expensive(about £350 to £400 UK as opposed to £270 for the Zeiss Terra 8 x 25, for example). But there is surely folly in pursuing this to its logical conclusion. For example, would it be sensible to create an even smaller, state-of-the-art 15mm model say, that can fit on two fingers and cost £500?

Of course not! That would be daft. It would be too small and fiddly to use and the amount of light it would bring to one’s eyes- even if it were 100 per cent efficient – would severely limit its use. That’s probably why the other premium binocular manufacturers – particularly Zeiss and Swarovski – have discontinued their 8 x 20 models in favour of 8x and 10 x 25mm units. Indeed, all of this has close parallels to the premium, small refractor market, where folk seem to pay exorbitant prices for tiny, albeit perfect, optics. Is that really sensible? Not in my mind – which is why I turned my back on it- but your mileage may vary!

Assorted notes:

The Leica Trinovid BCA 8 x 20 has ocular lenses just a little smaller than its objective lenses.

The instrument comes with a ten year warranty.

Each Leica binocular comes with a test certificate which claims that it was examined at various times during its manufacture prior to leaving the factory.

The Leica mini-binocular didn’t appear to come with caps, either for the objectives or eyepieces. It does just fit the small Opticron branded rainguard for compact binos however, which I use with my 8 x 25s.

It’s hard to find the ‘made in Portugal’ stamp on the Leica. But it is there, stealthily placed under the left barrel of the optic, and only accessed by fully extending the instrument’s IPD to its maximum where you’ll see: Made by Leica Portugal in good light.

The Opticron-branded rainguard I use for my 8x 25s just fits the smaller leica binocular.

More info on this package here.

Comparison with other Premium Pocket Binoculars

The Leica Trinovid BCA 8 x 20(left)versus with the Zeiss Terra 8 x 25(right). Note the latter’s larger frame and bigger focus wheel.

I spent a few hours comparing and contrasting the Zeiss Terra ED 8 x 25 and the Leica BCA 8 x 20 during bright sunny conditions(for January) and again under dull overcast conditions, as well as looking for performance differences at dusk, when the light rapidly fails afer sunset.

Under bright sunny conditions there was not much difference between both binoculars in terms of optical performance(both are excellent in this regard), except that the Zeiss has a noticeably wider field of view(119m compared with 110m@1000m). Because of its larger frame, larger focus wheel and larger exit pupil, the Zeiss proved easier to handle and  easily rendered the more comfortable, immersive view. The weight difference between these instruments is only 75g, so I don’t think many folk would quibble about the increase in bulk mass.

Under dull overcast conditions, the Zeiss produced a slightly brighter image, which became more and more pronounced as the light began to fade after sunset(around 5pm local time in the last week in January). This ought not surprise anyone, as both binoculars are highly efficient light gatherers and so simple physics dictates that the larger 25mm glass wins.

Close focus on the Leica was estimated to be about 1.8 metres, significantly longer than the Zeiss Terra at 1.4 metres.

Comparison under the Stars

The differences between the 25mm glass and its 20mm counterpart was most pronouced when aimed at the night sky. The larger exit pupil and aperture on the Zeiss Terra pocket allowed me to see significantly fainter stars around Orion’s belt and in the Hyades, compared with the Leica. At first I judged the contrast to be slightly better in the Leica than in the Zeiss but upon reflection, I attribute this to the smaller exit pupil in the former, which naturally generates a darker sky hinterland. The wider field of view in the Zeiss also helps frame objects that little bit better than the Leica. So, for casual stargazing the Zeiss proved noticeably superior to the Leica 8 x 20. I would not really recommend the 8 x 20 for such activities over a larger glass. But neither should anyone expect miracles here. The Leica is designed for daylight use in the main, although one can always enjoy the odd look at the Moon with the 8 x 20 when it is present in the sky.

Comparisons to a Celestron Trailseeker 8 x 32 Compact Binocular

How does the Leica Trinovid BCA 8 x 20 compare with a good 8 x 32 compact binocular?

Comparing a mid-sized, semi-compact binocular like the Celestron Trailseeker 8 x 32 with a diminutive 8 x 20 might seem a little out of place. But I think its inclusion is valid. The Trailseeker is very light; indeed, at just 453g, it ranks as one of the lightest 8 x 32s on the market, but still has many mechanical and optical features that only a few years ago were the preserve of premium binoculars; a magnesium alloy chassis, solid, well-designed metal-under rubberised adjustable eyecups, fully broadband multicoatings, dielectrically coated Bak-4 prisms et cetera.

Comparing the images served up by both the Celestron and the Leica in bright daylight in the open air, my wife and I both concluded that the Leica has slightly better contrast and sharpness across much of the field than the Celestron 8 x 32. With a small exit pupil of 2.5mm, the best part of your eye lens images the field. Edge of field performance is also significantly better in the Leica. But we also agreed that the Celestron was more comfortable to use, owing to its larger exit pupil (4mm). That said, we also reached the conclusion that the Celestron binocular rendered a slightly brighter image even in good light. But while there are perceptible differences between the two instruments, it must be stressed that these differences are small and subtle. Of course, that conclusion will likely upset a few of the more pestiferous premium bino junkies out there, but it is nonetheless true in our experience. The Celestron held its own very well indeed against the sensibly perfect Leica.

But there is considerably more to say about the economical Trailseeker. Move from the open air into a heavily canopied forest or copse and the advantages of the larger aperture binocular become much more apparent. Under these conditions, the Celestron fairs a lot better, delivering brighter images and more information to the eye. And as the light diminishes in the late afternoon, the Celestron clearly pulls ahead, as it ought to do, owing to its much greater light gathering power. At dusk, the differences between the two models are literally like night and day. Under these conditions, the 8 x 32 Trailseeker is vastly superior. It doesn’t matter if the optics in the Leica are sensibly perfect when you can’t see those details.

You see, the little Leica is like an elastic band – stretch it too far and it will break!

The same was true when pointing both binoculars at the night sky. After struggling to peer through the Leica, the Celestron was pure joy!  Its very efficient light transmission(~ 90 percent) and much wider field of view (7.8 degrees) brings so much more of the Universe to your eye!

These results helped us both to appreciate just how good the Chinese-made Celestron Trailseeker 8 x 32 really is. At roughly one third of the UK price(recently reduced to half its originanl market value(~£250) for clearance) of the Leica, we’d both say that it delivers 90 per cent of the bright, daytime performance of the Leica and vastly superior low light and night time performance. In many ways, this small and light-weight 8 x 32 is a more versatile performer than the 8 x 20 Leica Trinovid BCA, and those wishing to use their binoculars in more compromised lighting conditions would probably be better served with a good instrument in this size class.

And I have to ask this question again: is a weight of 453g really anathema to those who want to travel ultra-light?

nota bene: these comments regarding the Celestron Trailseeker 8 x 32 are also applicable to the previous discussion of my Zeiss Terra pocket glasss, in case you’re wondering.

These tests affirmed the excellent bang-for-buck the Celestron Trailseeker really represents. Veteran binocular enthusiast and fellow author, Gary Seronik, is dead right in highlighting these recent trends: mass produced, Chinese-derived optics are now coming so awfully close to premium performance-both optically and mechanically – that I would have reservations shelling out much more of my hard-earned cash just to get slightly better optical performance and the right to brag! For these reasons, I’m very pleased with and have no plans to upgrade the 8 x 32 Celestron; it will remain as part of my binocular stable.

Conclusions

The Leica Trinovid BCA 8 x 20: lean, mean optical machine.

The Leica Trinovid BCA 8 x 20 is a beautifully made pocket binocular that exudes elegance in both its solid mechanics and optics. It produces sensibly perfect images, rich in contrast and colour, whilst maintaining a very high degree of sharpness across the entire field. Perhaps uniquely, its advantages and disadvantages both pertain to its very small size.  Provided one knows its limitations though, it ought to provide its owners with many years of service as a high-quality, ultra-portable optical system that can be used for casual glassing at sports events, mountain climbing, hiking, birding, general sight-seeing and even some limited astronomical viewing.

I found my time with the little Leica binocular to be a particularly enriching experience. While it is expensive, it is certainly money well spent, especially if you plan to use it on a regular basis. Yet again, I know why Ian chose this little optical marvel. During the very long days of a Scottish summer, when the light is good and strong, I can imagine him enjoying this super light binocular for hours on end.

Highly recommended!

 

The author would like to extend his thanks to Ian for lending him the Leica Trinovid BCA 8 x 20 for this review.

Explore More:

Ken Rockwell’s Review of the Leica Trinovid BCA 8 x 20

Best Binocular Review of the Leica Trinovid BCA 10 x 25

Neil English is the author of seven books in amateur and professional astronomy. He has ambitions to write a full-length book on binoculars in the future to help his fellow amateurs find genuine bargains and de-bunk myths promulgated by binocular gayponauts and con artists over the last few decades.

 

De Fideli.

Product Review: The Celestron Trailseeker 8 x 32.

The Celestron Trailseeker 8 x 32 mid-size binocular.

Are you looking for a good quality mid-size binocular but don’t have £1000+ to spend on a Swarovski or a Leica or some such? Perhaps you’re looking for a nice Christmas gift for a loved one or a friend? Well, the Celestron Trailseeker 8 x 32 binocular could well be all the instrument you need!

If you’ve been following my binocular blogs, you’ll know that I have had to follow a very steep learning curve in order to bring my readers genuinely good bargains. And while it is generally true that you get what you pay for, there are always products that surprise in very pleasant ways, and this little binocular is one such instrument!

Celestron is not a name you’d normally associate with a high-quality roof prism binocular, but their optical engineers have successfully designed a great product in their Trailseeker range. The Trailseekers all feature full broadband multicoatings on all optical surfaces. The BAK-4 Schmidt-Pechan prisms are both phase and dielectricly coated to increase light transmission to the order of 90+ per cent, making it as efficient as ultra-premium models costing many times more.

The binocular measures 4.8 inches wide and 4.8 inches deep, standing just 1.9″ high; so very compact and easy to store in a backpack or small carry case. The binocular can be easily mounted to a tripod or monocular for additional stability.

My flashlight tests carried out indoors, as well as those conducted out of doors on bright street lighting and strongly backlit scenes showed that this model has excellent stray light and glare control. Indeed, its baffling of stray light is up there with the very best binoculars I have had the pleasure of testing. I was literally blown away by how resilent this binocular is to the intrusion of stray light! What that means in practice is that you get very high contrast images, rich in detail that would impress most anyone who tries them out!

The Trailseeker has a very robust magnesium alloy chassis; a feature often only found on premium models.

The binocular has a very strong and robust magnesium alloy chassis that is often only offered in the most expensive brands. It is also remarkably lightweight, tipping the scales at just 454g(16 oz). The strong, lightweight alloy frame also means that it will withstand knocks and bumps better than other models having cheaper plastic or ploycarbonate housings. The optics are 0-ringed sealed and purged with dry nitrogen gas to prevent internal fogging during cold-weather applications and corrosion of any metal parts used inside the instrument. The chassis is finished in a thick, rubberised green armouring that has excellent grip and which protects the main body from the elements. The underside of the binocular has neat thumb indents that make gripping the instrument very intuitive.

The underside of the Trailseeker has neat thumb indents that make handling the instrument very easy and intuitive.

The eyecups are of very high quality. They are made from solid metal with a soft, rubberised finish that makes them very comfortable to observe through. The eyecups twist up with two stops and hold their positions very well indeed, with absolutely no play. The eyerelief is 15.6mm which is adequate for most eyeglass wearers. Close focus is about 6 feet and the field of view is a very generous 7.8 angular degrees(136m@1000m).The dioptre setting is located under the right ocular lens and has just the right amount of friction to keep it rigidly in place from day to day, and from week to week.

The focuser and ocular lenses of the 8 x 32 Celestron Trailseeker.

Optically, the 8 x 32 Trailseeker packs a very powerful whallop. The instrument arrived well collimated out of the box, as evidenced by the perfectly correlated left and right eye images of a chimney located about 150 yards in the distance. The images are razor sharp with a large central sweetspot, softening as you move toward the edge, just like any other binocular. Chromatic aberration is a total non issue(I think this issue in many good quality binos available today has more heat than light). I see a lot of amateurs making bold claims about how ED glass elements make the image ‘brighter’ but in reality, the brightness of the image in the best quality binoculars has little to do with ED glass and much more to do with the quality of the coatings(particularly those of the dielectric variety) employed on the roof prism. For example, I was quite taken aback when I tested this unit out in low light conditions during dusk, when they completely outperformed a very high quality 8 x 25 pocket binocular lavished with premium ED Schott glass and dielctric coated roof prisms. There was no magic though; the very efficient light gathering capabilities of the Trailseeker’s larger 32mm objectives stole the show; it was much brighter, no ifs or buts about it!

A Curious Aside: I wanted to get to the bottom of this somewhat ‘fishy’ claim regarding ED glass, you know; that it gives brighter images and all that, so I decided to investigate some products on line. I mean, I can see why a better focused image in an ED instrument would confer a very slight advantage over a standard achromatic unit with the same coatings, but certainly not to the extent some folk have claimed in the past. Well, I didn’t have to search long before I stumbled on a comapny, Hawke, who make a few models of 8 x 32s, and out of sheer dumb luck(not really), I was able to compare the specifications of their Endurance ED 8x 32 and their Fronier HDX 8 x 32. As you can see from the specs, the Endurance ED does indeed have ED glass, while the Fronteir HDX does not. However, it is the latter that sells for a higher retail price(£259 as opposed to £199)! The one significant difference between these models is that the Endurance ED does not have dielectric coatings on the prisms while the HDX model does. And as this chap confirms, the HDX delivers the brighter image!

So there you have it!

I will further investigate these claims in a later blog, God willing.

No’ bad ken?

NB: The author has no affiliation with any of the binoculars discussed in any of his blogs.

A good design feature: the deeply recessed (9mm) objectives are well protected from rain, dust and peripheral glare.

Although not my favourite size of binocular, the 8 x 32 format is great for birding and other nature studies. Its greater light grasp and generous field of view will enable the user to work under fading light more efficiently and for longer than any pocket glass. The central focuser is well made but was a little on the stiff side when I first acquired it. But with regular use, it has loosened up nicely to allow good, fast focusing on mobile targets like birds in flight, or scurrying squirrels racing up and down a tree trunk. Going from one end of the focus travel to the other involves turning the focus wheel through one and a half full revolutions.

The Celestron Trailseeker 8 x 32 has very high quality twist up eyecups which make viewing through them very comfortable and immersive.

The little Celestron Trailseeker 8 x 32 produces very nice images of the heavens. Looking at a rising full Moon in a frosty winter sky showed very sharp, contrasty images rich in detail, with virtually no stray light that was all too easily evident in a few lesser instruments I have tested. Moving to the edge of the field does reveal some lateral chromatic aberration and some image softening but it’s perfectly acceptable to my eye. What is more, some of these off-axis aberrations can be effectively focused out. Star fields are beautiful and sharp with a jet black sky background, and the Trailseeker has served up very impressive views of some showpiece deep sky targets such as the Pleiades, the Hyades, the Sword Handle of Orion, the Alpha Persei Association and the great spiral galaxy in Andromeda. Stars stay sharp and pinpointed across the majority of the field, with only the outer 20 per cent or so beginning to show some enlargement. That said, I found this imperfection to be very acceptable. Indeed, you would have to shell out many times the modest cost of this binocular (£126) to get anything better in this regard methinks!

Unlike many other high quality binoculars, the accesories that come with the Trailseeker are also of exceptional quality. You get a very nicely made carry case that fits the instrument perfectly(shown above). You also receive a very nicely padded neckstrap with a Celestron orange logo.  That said, I discovered a slight hitch when I attached the supplied neck strap; when I tried to fold it around the binocular to insert it inside the carry case, it proved very difficult and caused the case to bulge outward a bit more than my liking. In the end, I elected to attach a lighter but lower quality strap to the binocular as an interim measure. The instrument also comes with a good quality binocular harness, though I’ve not tried it out for size yet. In addition, the binocular comes with fully attachable rubber ocular and objective lens covers, a microfibre lens cleaning cloth, and a neat user manual in five modern languages. The package is protected by Celestron’s limited lifetime warranty.

The Celestron Trailseeker 8 x 32 package.

All in all, the Celestron Trailseeker is a most impressive piece of kit and it’s obvious that the company cut no serious corners in bringing these high quality instruments to market. I think it represents exceptional value for money in a market saturated by a string of  similarly priced, but lower quality offerings. Kudos to Celestron for making these instruments available at such an incredible price(they originally retailed for over £250 when first launched but are now widely discounted)!

Disclaimer: The instrument was purchased from Tring Astronomy Centre, the staff of which proved very professional and who insured a super fast delivery.

Additional Information:

Promotional Video on the Celestron Trailseeker Binocular Range.

BBR overview of the external features of the 10 x 32 Trailseeker Binocular.

Don’t just take my word for it: read what other purchasers have said about the Celestron Trailseekers.

BBR Review of the 10 x 32 Celestron TrailSeeker Binocular.

BBR Review of the Celestron Trailseeker 8 x 42 Binocular.

 

Neil English is the author of seven books in amateur and professional astronomy, including a 665 page history of visual astronomy: Chronicling the Golden Age of Astronomy, favourably reviewed by several amateur and professional astronomers.

 

De Fideli.

Old vs New.

How does a classic Zeiss binocular square up to a modern roof prism binocular?

Unlike telescopes, which are mainly used by dedicated amateur astronomers, binoculars, for obvious reasons, are owned and used by a much broader cross section of the general population. When my students get to know me, they will inevitably have to endure my unbridled enthusiasm for optical devices of all kinds lol, and that includes binoculars. One of my mathematics students, Sandy, expressed an unusual interest in some of my instruments, and he further informed me that his parents, who run a small ferrying business at Balmaha, on the shores of nearby Loch Lomond, used several binoculars in their everyday work. My interest was further piqued when Sandy told me that his grandfather owned a big Zeiss binocular, which was inherited by his father and would eventually be passed on to him in the goodness of time. I asked Sandy whether he would be willing to bring the Zeiss binocular by so that I could have a look at it. After checking with his parents, Sandy agreed and kindly allowed me to use it for a week in order that I could assess it and give it a good clean. Naturally enough, I jumped at the opportunity!

The instrument, a Carl Zeiss Jenoptem 10 x 50W porro prism binocular, came in a lovely leather case; a far cry form anything made in this era.

The Zeiss Jenoptem 10x 50W complete with original leather carry case.

The instrument had no lens caps and so had accumulated quite a bit of grime on both the ocular and objective lenses over the years. The Jenoptem, which was manufactured in East Germany(DDR), featured a Zeiss multi-coating, which helped me to date it to after 1978, when the company apparently began to apply their anti-reflection coatings to all the lenses and prisms in the optical train. So my guess is that it was probably acquired in the early 1980s. I believe Zeiss Jena offered a higher quality porro 10 x 50 in the Decarem line around the same period, but I have not had the pleasure of testing one of these units out.

The Zeiss Jenoptem is multi-coated.

The instrument has a very Spartan look and feel about it. Weighing in at about 1 kilogram, the Jenoptem is built like a proverbial tank, with a central focusing wheel and right eye dioptre.Turning the nicely machined metal focusing wheel first clockwise, and then anti-clockwise, all the way through its trave,l showed that it was still in excellent working condition, with zero backlash and bumping that one usually encounters with cheaper porro prism binoculars.

As expected from Zeiss, the Jenoptem has a very well made focuser that moves with silky smoothness and with zero backlash.

To begin the cleaning process, I unscrewed the objective housings from the front of the binocular in order to get at the inside surface of the objective lenses, which had a significant amount of grime as well as a small amount of fungal growth. Using a good quality lens brush, I carefully removed much of the dust before using a microfibre lens cleaning cloth soaked in a little Baader Optical Wonder fluid. In just a few minutes I was able to remove the remaining grime on both the outer and inner surfaces of the binocular objectives, as well as the surfaces of the prisms in the rear module of the instrument. The ocular lenses were also given a good cleaning.

The objectives of the Zeiss Jenoptem can be accessed by uncrewing the front of the binocular from the prism and ocular housing.

I was able to verify that the prisms were indeed coated in the same way as the objectives, although I also discovered that the steel clips holding the prisms in place had rusted significantly over time. I did not attempt to clean the clips, as I judged that doing so might throw the instrument out of collimation.

Note the rusted steel clip holding one of the prisms in place, as well as the anti-reflection coating of the second prism(after cleaning).

The objectives on the Jenoptem after cleaning. Note the anti-reflection coatings.

Seen in broad daylight, I was able to verify that the lens coatings had not suffered much in the way of wearing, looking smooth and evenly applied, giving a bluish or purple cast, depending on the angle of view.

The appearance of the objectives in broad daylight after cleaning.

 

And the ocular lenses.

Optical tests:

After screwing the objective modules back into place, I was now ready to begin my optical tests of this older Zeiss binocular. I compared the views served up by this instrument with those garnered by my Barr & Stroud 10 x 50 Sierra roof prism binocular that I use almost exclusively for astronomical viewing. After setting the right eye dioptre on the Zeiss to suit my own eyes, I started with an iphone torch test to assess how the instruments fared in suppressing glare and internal reflections.

The Zeiss 10x 50W Jenoptem(right) and my Barr & Stroud 10x 50 Sierra roof prism binocular(left).

Because the Zeiss does not have the same close focus (~2m) performance as my Barr & Stroud, I had to place my iphone torch several metres away in my hallway in order to get the Zeiss to focus on its light. As usual, the torch was adjusted to its highest (read brightest) setting. Comparing the two in-focus images, I could see that the Zeiss fared considerably worse than the Barr & Stroud. Specifically, it picked up two fairly bright internal reflections, as well as quite a lot of contrast-robbing diffused light, which rendered the Zeiss image considerably less clean and contrasted in comparison to my control binocular. The difference was quite striking!

After dark, I aimed the binoculars at a bright sodium street lamp and again compared the images served up in both instruments. As expected, the Zeiss showed much more in the way of internal reflections, with a lot of diffused light that produced a fog-like veil around the street lamp. The Sierra 10 x 50 in comparison served up a much more ‘punchy’ image with much better control of internal reflections and far less of the foggy, diffused light evidenced in the Zeiss.

Next, I compared the Zeiss and the Barr & Stroud Sierra on a daylight test, examining a tree trunk in the swing park about 80 yards from my front door. Again, the difference between both instruments was striking! Although the image was very sharp in the Zeiss at the centre of the field, it was noticeably dimmer than the Sierra. That diffused light I picked up in the iphone torch test created a foggy veil that significantly reduced its contrast in comparison to the control binocular. I was also able to discern many more low contrast details in the Sierra owing to its ability to gather significantly more light than the older Zeiss. The colour cast presented by both binoculars was also noteworthy. The Zeiss threw up quite a strong yellowish colour cast  to the Sierra, which showed a much more neutral cast in comparison.

Examining the periphery of the same field also showed that the Sierra was exhibiting a larger depth of focus than the Zeiss, which was quite unexpected, as I had been given to understand that porro prism binoculars in general show more depth of focus than their roof prism counterparts. In addition, the Zeiss showed more distortion at the edges of the field than the control binocular.

The Zeiss Jenoptem has very tight eye relief, which I estimated to be just 10mm. The Barr & Stroud Sierra, in contrast, has much more generous eye relief in comparison- 17mm – making it significantly more suitable for eye glass wearers. Indeed, I found it difficult to image the entire field in the Zeiss, having to move my eyeball around to see the field stops.

In summary, these daylight tests clearly showed that the venerable Zeiss was no match optically for the Barr & Stroud 10 x 50 roof prism I had tested it against. The latter was simply in a different league to the former, no question about it!

Handling in the Field:

The Zeiss is rather big and clunky in my small hands and is more difficult to find that optimal position while viewing for extended periods. Weighing more than 200g more than the Sierra, it is also harder to hold steady. The significantly smaller frame of the Sierra roof prism binocular is much easier to negotiate, and is simply more comfortable to use. In addition, the Zeiss has no provision to mount it on a lightweight tripod or monopod, but the Sierra, like most other modern binoculars, does.

Astronomical tests:

Though the weather proved quite unsettled during the week that I tested the Zeiss, I did get a few opportunities to test it out on the night sky. Once again, I used my Barr & Stroud Sierra 10x 50 roof prism as a suitable control. My first target was a bright, waxing gibbous Moon fairly low in the southern sky. The Zeiss threw up more in the way of internal reflections than the Sierra. The colour cast of the lunar surface appeared more yellow in  the Zeiss compared with the cleaner images of the Sierra. As I expected from my iphone torch tests, the sky immediately arround the Moon was also brighter in the Zeiss, with noticeably lower contrast than the Sierra. Moving the Moon to the edge of the field also showed that the Zeiss threw up more distortions than the Sierra control binocular.

Turning to Vega high in the northwest after sunset produced good on-axis images in both binoculars, but when moved to the edge of the field, the Zeiss threw up that little bit more distortion than the Barr & Stroud Sierra. The same was true when I examined the Pleaides and the Hyades in Taurus.

Conclusions and Implications:

The Zeiss Jenoptem was a good binocular in its day but is clearly inferior in almost every sense to the Barr & Stroud roof binocular used in comparison. 40 years ago, the Zenoptem would have set the average factory worker a whole month’s salary to acquire new. In contrast, the Barr & Stroud Sierra can be had for between £100 and £120 in today’s market.  The value of waterproofing was made manifest in the observation of rusting of some of the metal internal components of the Zeiss. The Sierra, in contrast, is fully waterproof, o-ring sealed and purged with dry nitrogen gas to inhibit internal fogging and corrosion of any metallic components used in its construction.

Enormous advances in optical technology over the last four decades, particularly full broadband multi-coatings applied to all lens and prism surfaces, higher quality optical glass, as well as phase coated prisms on the roof binocular, collectively allow very efficient light transmissions to the eye. This is all the more remarkable since roof prism designs usually have many more optical components than their porro prism counterparts.

Better eregonomics in modern roof prism binoculars as well the employment of strong, low mass polycarbonate housings in their design make them lighter and easier to use than their porro prism counterparts from a generation ago. All of these add to the comfort of using them either during the day or at night when looking at the heavens.

I had a look on ebay to see what these old Jenoptems were being offered for. I found quite a few of them selling for between £150 and £200, so not the high prices demanded by other classic binoculars.

Like with all optical firms, time has marched on, with modern binoculars offering much better performance than earlier models.

This comparison test must have implications for many people who already own or use older binoculars and who have not compared them to modern incarnations. And that’s as true for Zeiss as with any other manufacturer. Indeed, I was quite shocked at how much better my first quality roof prism 8 x 42 roof prism binocular fared compared to an old 7x 50 porro I was gifted back in the early 1990s. Technology has well and truly marched on! And while I like classic instruments just as much as the next guy, I see little point in using any when even modest instruments created in the modern age are likely to perform better than similar instruments made a generation ago. It’s just a hard fact of life.

The technology of the past is certainly interesting but it would be daft to neglect the advances offered in the modern era.

 

I would like to extend my thanks to Sandy and his parents for allowing me to test drive these old binoculars. I will be advising him to use lens caps on the optics when not in use and have also provided a sachet of silica gel dessicant to minimise moisture-induced corrosion of the optic.

 

Neil English discusses all manner of classic telescope technology in his 650+ page historical work, Chronicling the Golden Age of Astronomy(Springer-Nature).

 

De Fideli.

In Search of a Good 8 x 32 Binocular.

Two mid-priced 8 x 32 binoculars compared: the Celestron Trailseeker(left) and the Helios LightWing HR( right).

The march of technology continues apace and never ceases to amaze me. This is especially true when it comes to telescope and binocular optics. You can now buy very decent optics at budget prices that display a level of quality we could only dream of a couple of decades ago. And technologies that were only available on premium optics up to fairly recently are now being offered by companies offering much more economical packages to sate the requirements of the masses.

That’s exactly how I feel about my recent foray into binocular testing. Advances in coating technology, in particular, has allowed many new optical firms to offer products that are edging ever closer to the performance levels only available on premium models until recently. Even entry-level roof prism binoculars feature decent anti-reflection coatings on all optical surfaces(which can be as many as 30 in a good roof prism binocular), as well as phase correction technology that significantly increase contrast, accurate colour rendition and image brightness. These less expensive models used either aluminium or silver coatings to boost light transmissions to as high as 80 to 85 per cent, but one can now obtain very economically priced models that also feature super-high reflectivity, broadband dielectric coatings that have increased light transmission to above 90 per cent, in touching distance of the most expensive, premium binoculars money can buy.

Unfortunately, many amateurs who enjoy using quality binoculars mistakenly conflate high-level optical performance with the introduction of extra low dispersion (ED) glass, but the truth is that such an addition contributes little to the quality of the optical experience. Much more significant is the use of higher quality coatings that significantly increase both the brightness and contrast of the images, which in turn enables one to see those finer details, thereby boosting resolution(perhaps this is why the Helios has HR in its name?). Of course, many(but not all) premium binocular manufacturers use a combination of ED glass elements and the finest dielectric coatings, making it all the more difficult for the user to assess the relative importance of either component. But I was able to explore and confirm the dramatic effects of the latter by putting a couple of  mid-priced 8 x 32 compact roof prism binoculars through their paces; a Helios LightWing HR and a Celestron Trailseeker(both pictured above), both of which feature premium quality dielctric coatings on the prism surfaces as well as high-quality broadband anti-reflection coatings on the multiple lenses and prisms used in their construction. Neither instrument contains ED glass elements however. For more on this, check out this short youtube presentation by an experienced glasser and binocular salesman describing one of the models I will be evaluating in this blog(the Helios LightWing),  and who formed the same conclusions as this author.

Both instruments were acquired from the same source, Tring Astronomy Centre. Their friendly and knowledgeable staff have offered exceptional service with a number of past purchases and I had thus no hesitation approaching them again for the acquisition of these 8 x 32 compact binocular models.

The first model I acquired was the Helios LightWing HR 8 x 32, which set me back £127 plus £5 to ensure an expedited delivery of the package within 24 hours of ordering. As soon as it arrived, I inspected the contents, which included the binocular with a rain guard, soft carry case, a lens cloth and generic(read single page instruction sheet) and padded neck strap. Within minutes of its arrival, I had the binocular out of its case to perform my iphone torch test in my living room to see how well an intense beam of white light behaved as it passed through the instrument. As I outlined in a few previous blogs, such a test is extraordinarily sensitive, showing up even the slightest stray reflections in the field of view and revealing how well the optical components suppressed the tendency of the light to diffuse across the field, reducing contrast as it does. Well, to my great relief, the result was excellent! Despite the torch being set at its highest setting in a darkened room, the Helios LightWing HR showed only the feeblest level of ghosting on axis. What is more, there was no difraction spikes or diffused light in the field! The image was exceptionally clean. Indeed, comparing the result to my control binocular, a Barr & Stroud Savannah 8 x 42, which also exhibits exceptional stray light control, the Helios was providing even better results!

To put this in some additional context, the torchlight test result for the Helios 8 x 32 was better than my Zeiss Terra ED 8 x 25 pocket binocular and a Swarovski EL Range 10 x 42, as I recall from my notes!

I now had a new standard by which to measure all other binoculars!

The same was also true when I placed the light beam just outside the field of view. Only a very minimal amount of glare was seen in the field.

The Helios LightWing HR 8x 32 revealed exceptional control of stray light and annoying internal reflections.

Wow!

This told me that the binocular ought to produce very high contrast images in even the most demanding conditions, either by day, glassing in strongly backlit scenes, or at night, when looking at bright light sources, such as artificial street lighting or a bright Moon. No doubt, this is attributed to a variety of factors including excellent multi-layer coatings on all optical surfaces, as well as a sound knowledge of how to adequately baffle the instrument.

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Note to the reader: My pet peeve is seeing excessive glare and strong ghosting from internal reflections in a binocular image. Indeed, I am quite intolerant of it! Moreover, I usually dismiss any reviews that do not test for this phenomenon. Unfortunately, that also entails taking the majority of user reviews I read online with a large dose of salt!

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Examining the Helios, I noted the unusual colour cast of the anti-reflection coatings on both the objective and ocular lenses. They seemed to be immaculately applied! I also noted how the objectives were recessed very deeply; with ~ 10mm of overhang. This is a very good(and often overlooked!) design feature, as it cuts down on peripheral glare during bright daylight observations and also affords considerable protection from dust and rain.

The unusual colour cast of the anti-reflection coatings of the Helios LightWing objective lenses.

Mechanical assessment: The Helios is very well constructed. The chassis is fabricated from a magnesium alloy which combines light weight(500g) with good mechanical strength. This is an unsual offering in such a low-cost instrument, with cheaper polycarbonate or even ABS plastic being the rule rather than the exception on models offered at this price point. The central hinge had enough tension to maintain my particular IPD but I would have liked it to be just a little bit stiffer(just like my wonderful Barr & Stroud Savannah 8 x 42). I found handling the binocular to be unusually tricky, as the rubber eyes needed to attach the neckstrap protrude from the barrels a little too much, making it rather more awkward to get the binocular comfortably placed in my hands while observing.

The focus wheel is very large in relation to the overall size of the instrument. Indeed, I thought it was a little too large! Although I could get a good grip, rotating it showed that it was somewhat clunky and offered unusual resistance to movement. In contrast, the dioptre ring moved with silky smoothness, and you can actually see the right ocular field lens moving as you rotate it!

The buttery smooth right-barrel dioptre ring is a joy to adjust.

The eyecups are rather stiff but do extend upwards with two clickstops. With an eye relief of 15.6mm, eyeglass wearers will find it difficult to image the entire field. Fortunately for me though, this wasn’t a problem, as I don’t wear eye glasses while glassing. The cups are made from quality metal covered by a soft rubber-like material. They are very firm and hold their positions securely even when undue pressure is applied to them. Overall, a very nice touch!

The chassis is covered by a rather thin rubberised skin, which was somewhat thinner than I’ve seen on a variety of other binoculars I’ve sampled. As a result, it has slightly less friction while man handling, which can prove important, especially if used for prolonged periods in the field. It also means that it would wear down that little bit faster after extended use.

The Helios can be attached to a tripod or monopod for increased stability via the built-in bush located between the barrels, toward the front of the instrument.

Optical daylight testing: Scanning some autumn leaves in my back garden confirmed what I had witnessed in the torchlight test. The image was very bright and tack sharp with wonderful contrast and colour fidelity. There was nary a trace of chromatic aberration( which continues to affirm my belief that ED glass is unnecessary: -a marketing gimmick? – for such small, low power binoculars). However, this was only true in the central 50 per cent of the field. The outer part of the field became progressively softer with the edge being out of focus. Examining a telephone pole about 25 yards in the distance unveiled very strong field curvature as it was moved from the centre to the edge of the field of view.

I hit another snag when I attempted to image the Fintry hills about a mile in the distance. The focus wheel was racked to the end of its natural focus travel but I still could not quite reach a sharp focus. Adjusting the dioptre ring on the right barrel allowed me to just get there but the left barrel was still not sharply focused. After dark, I did a test on the bright star Vega, which unfortunately confirmed my daylight tests. Although I could achieve pinpoint sharp images in the right barrel, the left barrel showed that the star was badly bloated. Another test on the Moon showed the same thing. The right barrel gave a razor sharp image with exceptional contrast and no internal reflections or diffused light around it, but the image at the edge was badly out of focus.

The whole experience left me somewhat bewildered. Why expend so much effort into applying state-of-the art coatings into a binocular with nice mechanical features, only to see excessive field curvature in the outer part of the field? It just didn’t make sense! I mean, Helios could have made the field a little smaller(it has a true field of 7.8 degrees) with sharper edge definition and I would have been happy.  In reallity you see, I had been spoiled by the nearly flat fields presented by my Barr & Stroud Savannah 8 x 42(and over a larger field to boot- 8.2 degrees), as well as those presented by my Zeiss Terra pocket and my other models with aspherical ocular lenses. Needless to say I was disappointed and decided to contact the staff at Tring the same evening, explaining my findings.

Next morning, they contacted me, apologising for the defective optic, as well as suggesting that I could have a replacement Helios LightWing, or try a Celestron Trailseeker 8 x 32, which apparently had very similar specifications to the former. Now, I had a bad experience with an 8 x 25 Celestron Nature DX(an entry-level roof prism binocular) which showed far too much glare and internal reflections for my liking. But I had a good look at the specifications on the Celestron Trailseeker models, which were recently discounted by 20 per cent and were now being offered at the same price as I had paid for the Helios LightWing. After some deliberation, I decided to accept their offer of trying the Trailseeker. And to their credit, Tring shipped out the binocular, together with a return label for the Helios, the same day, and I received it less than 24 hours later!

How about that for customer service!

The Celestron Trailseeker 8 x 32 package.

With some trepidation, I opened the package and inspected its contents. First impressions looked good. I received the binocular, a much higher quality carry case, a binocular harness, tethered rubber objective caps and rain guard, a decent quality padded neck strap, a lens cleaning cloth and a comprehensive instruction manual dedicated to the Trailseeker  line of binoculars( in five languages).

The Trailseeker binocular specifications looked very similar to the Helios, which included the application of premium-quality phase and dielectric coatings, a 7.8 degree field (136m @1000m), Bak-4 prisms, o-ring sealed, dry nitrogen purged, making it fog proof and water proof(though to what extent was not revealed). And just like the Helios, the Trailseeker can be mounted on a tripod or monopod.

As with the Helios, the Trailseeker has very deeply recessed objectives (again about 10mm) but the anti-reflection coatings looked different in daylight;

The Trailseeker also has deeply recessed objective lenses but the coatings appeared different.

Just like the Helios, the Celestron Trailseeker has a rugged magnesium alloy chassis but the focus wheel is significantly smaller. Weighing in at just 450g, it is 50g less bulky than the Helios. The Trailseeker build quality is excellent; rugged, much easier to handle than the Helios and overall having better ergonomics. The tough, rubberised covering has better grip than the Helios too, and small thumb indentations on the belly of the instrument makes it that little bit more comfortable to hold in the hand.

Nicely placed thumb indents on the underside of the Trailseeker make handling that little bit more intuitive.

Well, you can guess what I did next; yep, I set up my iphone torch, turned it up to its brightest setting and placed it in the corner of my living room with the curtains pulled to cut off much of the daylight. With a good close focus of about 6.5 feet, eagerly I aimed the Trailseeker binocular at the light and examined the image.

Drum roll……………………………………….

An excellent result! Internal reflections were minimal, diffused glare was all but absent and diffraction spikes were very subdued. Comparing the Trailseeker to my Barr & Stroud Savannah 8x 42 control binocular showed that it was on par with it. What a relief! To be honest, I had some reservations about the Celestron, owing to my unfavourable experience with the cheaper Nature DX model, and so I half expected that they might skimp on this important process. But no, they did a very good job! So far, so very good!

I was also impressed with the mechanical attributes of the Trailseeker, which is difficult to ascertain vicariously without man handling it. Though quite conservative in design, the eyecups are of high quality(metal over rubber) but have a nice feel about them. They twist up much more easily than those on the Helios and have two settings. Like the Helios, the eye relief is pretty tight(15.6mm) for eye glass wearers but is plenty good enough for those who observe without glasses.They do not budge even when considerable force is applied to them. I would rate their quality as very high, so much so that I don’t think I will have much in the way of problems with them going forward.

The metal-over rubber eyecups of the Celestron Trailseeker are a good step up from the Nature DX models and feel very secure while glassing.

The focus wheel has a ‘plasticky’ feel about it but unlike the Helios, infinity focus does not lie at the extreme end of the focus travel. This is actually useful for ‘focusing out’ some of the aberrations at the extreme edge of the field. Unlike other user reviews of the Trailseeker, the focus wheel on the unit I received was quite stiff to operate out of the box but this will surely loosen up with more use. Rotating the focuser both clockwise and anti-clockwise revealed little or no backlash or bumpy spots that you often encounter on cheaper binoculars. Some users balk at the idea of using a plastic focuser but I cannot for the life of me understand why it would make much difference. I mean, if it works, it works! What’s to give?

The focus wheel on the Trailseeker is nothing out of the ordinary but does work well in field use.

The dioptre ring is located under the right eyecup. It rotates smoothly with just the right amount of friction.

Optical daylight testing: As I’ve illustrated above, good mechanical design and great control of stray light don’t count for much if the images don’t deliver. So I was eager to see how the Celestron Trailseeker behaved when looking ’round the landscape. Accordingly, I examined the same autumn leaves in my back garden set a few tens of yards away. This time, the results were very much more encouraging! The leaves focused beautifully, throwing up excellent brightness, contrast and sharpness with a much wider sweet spot than in the Helios, which I estimated to be about 70 per cent of the field.  I could immediately tell that there was much less field curvature in this binocular than in the Helios, allowing me to sharpen up the edge of field definition with only minor tweaking of the focus. This much reduced field curvature was also apparent when I examined the same telephone poll I observed with the Helios. Instead of the strong off-axis distortions I encountered with that instrument, as the pole was moved from the centre to the periphery of the field, the Trailseeker proved much more forgiving.

What a relief!

Having said all of this, there was more off-axis field curvature in the Trailseeker than in my Barr & Stroud Savannah 8 x 42, which, in comparison, throws up a wider and flatter field nearly all the way to the edge. As I’ve said many times before, the Savannah is a phenomenal operator given its very modest price tag. Perhaps some of the drooling gayponauts reading this blog right now could get off their fat backsides and confirm it!

Nah, probably too much to ask!

The Barr & Stroud Savannah 8 x 42 wide-angle binocular; an existential threat to the hubris of thieving gayponauts.

Nightime testing:

After dark, the Trailseeker delivered excellent results on artificial street lights, just as my torchlight tests reliably anticipated. There was no annoying glare, internal reflections and the diffraction spikes were small and very subdued. Turning the instrument on a low Moon skirting the horizon showed wonderful sharpness on axis, with well above average contrast. And when I placed the Moon at the edge of the field, it remained quite sharp, though visibly softened by a small amount of field curvature. Needless to say, it was in a completely different league to the Helios in this regard!

Later in the night, with the Moon having set, I examined the appearance of the large and sprawling Alpha Persei Association located nearly overhead at the time. This provided an excellent test of how its many bright stellar members would behave from the centre of the binocular field to the field stop. To my relief, the stars remained acceptably small and sharp across the entire field, with the stars at the edge of the field requiring only a small tweak in focus to improve their definition. They did not balloon to stupidly large sizes like I observed in the Helios.

Turning the binocular on the Hyades in Taurus gave very pleasing results too. Contrast was excellent with its many colourful stellar components remaining acceptably small and crisp even at the edges of the field.

I considered these results to be very acceptable. This is one small binocular that can be used profitably for nightime observations!

A Walk in the Countryside with the Celestron Trailseeker 8 x 32

Although the Celestron Trailseeker 8 x 32 is a small, high-quality and lightweight instrument, it is not readily pocketable, unless you have a coat that has rather large and deep receptacles. Having tried a few 8 x 32 binoculars, I personally find them a little awkward to use in comparison to my two favourite pocket binoculars like my Opticron Aspheric LE and my Zeiss Terra(both of which are 8 x 25 formats) or a larger instrument such as my 8 x 42. I just find the 8 x 32 format a bit kludgy in my rather small hands. That said, the 8 x 32 seems to be a popular choice for birders and other nature enthusiasts, who tire of schlepping around a larger instrument for hours on end. In good light, there’s no real advantage in using a larger format binocular and so I tend to use my pocket binos most often. But if you are observing in low light conditions, such as a dull, overcast winter day, late in the evening or early in the morning, the 8 x 32 would definitely be a better choice. I have verified this wisdom by comparing the views through my  8 x 25 Terra and the 8 x 32 Trailseeker at dusk, where the brighter images served up by the latter are plainly in evidence. And because you have a relative abundance of good quality light to play with, you can see more details in the image. Shimples!

Choosing a small binocular is a deeply personal choice that you can only decide on after trying them in the field.

The consensus view is that larger binoculars are more comfortable to use since their larger ocular lenses make it easier to place your eyes in the correct position to see and immerse yourself in the field of view. I believe there is definitely some truth in this, but in the end it’s really about what you get used to. I personally have no trouble lining up my eyes with the smaller eye lenses on my pocket binos, so I never see this as being much of an issue.

Enjoying the rich colours of autumn on a hill walk overlooking Fintry.

All that having been said, the Trailseeker 8 x 32 is a very handy companion on my daily two-mile ramble ’round Culcreuch Castle Estate, which has some extensive wooded areas, a fast-flowing river, numerous small brooks, open fields which extend towards the surrounding hills and a small pond, where I enjoy watching the antics of a variety of water-loving avian species. The field of view is very generous at 7.8 degrees, which is quite large as most 8 x 32 binoculars go, though some models sport still larger fields in excess of 8( ~ >140m@1000m) angular degrees. The razor sharp optics on the Trailseeker has given me many wonderful views of golden autumn leaves glistening in weak November sunshine. I especially love to stand under a tree and glass the branches above me, focusing in on their wondrously complex contours. The low autumn Sun this time of year illumines the trunks of the trees in the wooded areas around the estate, highlighting the wonderful texture of the tree bark and the play of light upon the lichens and mosses that live symbiotically with it.

If time is not against me, sometimes I like to stop and focus in on a stretch of water flowing from the numerous small streams that feed into the Endrick, imaging the contours of rocks laden with fallen leaves and closing in on the foamy organic bubbles that swarm along the fast-flowing stretches. And when the Sun shines on the water, I can feast my eyes on the beautiful and intense reflections emanating from its surface. This is where glare control is paramount, as even a small amount of light leakage can ruin an otherwise compelling binocular scene.

Binoculars have come a very long way since their founding days. I find it amazing that one can acquire quality optics and durable mechanics like this at such keen prices. The Celestron Trailseeker 8 x 32 has been a very pleasant surprise, combining wonderful ergonomics with state-of-the-art optical science. I think a lot of people will enjoy it.  And now that its price has come down significantly, this is a good time to grab yourself a real bargain and enjoy the wonders of nature up close and deeply personal.

Just in case……………..

 

Thanks for reading!

 

Neil English has fallen in love with what binoculars have revealed to him, and is seriously thinking of compiling a larger portfolio of  binocular experiences for a future book-length treatise on their various applications.

 

De Fideli.

Product Review: The Opticron Aspheric LE WP 8 x 25 Pocket Binocular.

A fine compact binocular at a fair price.

Tiny little pocket binoculars have grown on me.They can be supremely useful to those who value or need ultra-portability, when larger binoculars simply are unworkable. Their tiny size ensures that they can be carried in a pocket or a small pouch, where they can accompnay hikers, hunters, sports enthusiasts, bird watchers and nature lovers who delight in seeing the full glory of God’s created order. Frustrated by a lack of any credible reviews of a variety of models, I began a ‘search out and test ‘ program that would teach me to select models that offered good optical and mechanical performance, as well as good value for money.  As you may appreciate, this was far easier said than done, but in the end, I did find a model that I could trust to deliver the readies; enter the Opticron Aspheric LE WP 8x 25 binocular.

Retailing for between £120 and £130 ( ~$175 US), the little Opticron pocket binocular didn’t come cheap. But good optics and mechanics are worth having, especially if the user intends to employ the instrument on a regular basis. As I explained, I chose this model based on the performance of a first generation Opticron Aspheric that I had purchased some time ago for my wife, possessing identical optical specifications to this newer model, but without having the additional advantage of being nitrogen purged, as well as being water and fog proof. In truth, I chose the original model without much in the way of research and with very little experience of what the market offered; Opticron is a good make, trusted by many enthusiasts for delivering good optical performance at a fair price.

Opticron began trading back in 1970, founded as a small British family firm, and offering binoculars, spotting scopes and other related sports optics for the nature enthusiast. Since those founding days, Opticron has continued to innovate, where it now is a major player in this competitive market, offering well made products catering for the budgets of both novices and discerning veterans alike. And while some of their less expensive models are made in China, many of their high-end products are still assembled in Japan.

What you get.

What your cash buys you: The Opticron was purchased from Tring Astronomy Centre. It arrived double-boxed and with no evidence of damage in transit. You get the binocular with both ocular and objective covers, a high quality neoprene padded case, a comprehensive instruction manual & warranty card. The details of that all-important warranty are shown below:

Details of the warranty.

After a few days of intensive testing I was satisfied that I had received a high quality instrument and so I elected to register my binocular on the Opticron website.Owners are not obligated to register the instrument in this way however, as all that is required is proof of purchase, should any issue arise with the instrument in normal use.

Binocular Mechanics: The Optricron Aspheric LE WP 8 x 25 is a classically designed pocket binocular with a double-hinge designed allowing the instrument to fold up into a very small size that can be held in the palm of your hand. The hinges have just the right amount of tension, opening up and holding their position even if held with one hand.

The focuser is slightly larger than the first-generation model, and has better grip, allowing you to use it even while wearing gloves. The barrels and bridge of the binocular are made from aluminium, overlaid with a tough, protective rubberised armouring. Compared to the first-generation model,  the new incarnation induces more friction with your fingers, an important feature if it is to be used for extended periods of time.

The New Opticron Aspheric LE is now water and fog proof.

Initially, I found that turning the focuser to be a bit on the stiff side, but after a few days of frequent use, I became used to it. Turning the focuser either clockwise or anticlockwise showed that there was no backlash, moving smoothly in either direction. The instrument has an integrated neoprene lanyard which can be wound up around the bridge while being stored in its case. I very much like this rather understated feature, as there is no need to fiddle about attaching a strap. Out of the box, it’s ready to use!

Using the Optricon Aspheric LE WP is child’s play; just twist up the eyecups and they click into place. There are no intermediate settings. If you wear glasses, leave the eyecups down.

The twist-up eyecups have a soft rubberised overcoat which are supremely comfortable on the eyes. There are just two positions; fully down or fully up. Once twisted up, the cups lock in place and rigidly stay in place with a click. Eye relief is very generous(16mm), allowing eye glass wearers to engage with the entire field. I don’t use glasses while observing through binoculars, so I always pop the eyecups up while viewing through them. Optimal eye placement is very easy to find quickly, thanks to the large field lens, with none of the annoying blackouts I experienced on a few lesser models.

The dioptre setting is located in a sensible place; right under the right eyecup. A small and very elegantly designed protruding lever on the dioptre ring makes it very easy to rotate either clockwise or anti-clockwise. It works well and stays in place even after repeatedly removing the instrument in and out of its small carry case.

An elegant design feature; a small protruding lever under the right eyecup makes it easy to adjust the dioptre setting.

I measured the interpupillary(IPD) range to be between 32 and 75mm, ample enough to accommodate most any individual. Moreover, the well designed dual hinges on the bridge ensure that once deployed they stay in place with little or no need to micro-adjust while in use. The Opticron pocket binocular weighs in at just over 290 grams.

If the Opticron Aspheric pocket binocular were a car, it would surely be an Aston Martin.

Optical Assessment: Although this tiny binocular does not have a stalk to allow it to be mated to a monopod or tripod, I was able to assess how well collimated it was by resting the binocular on a high fence, and examining the images of a rooftop some 100 yards in the distance, checking to see that the images in the individual barrels were correlated both horizontally and vertically. This was sufficient to affirm that the binocular was indeed well collimated.

During daylight hours, the binocular delivers very bright and colour-pure images thanks to a well made optical system which includes properly applied multi-coatings on all optical surfaces, good baffling aginst stray light and silver coated prisms(boosting light transmission to 95-98 per cent). The binocular also has correctly executed phase coatings on the prisms to assure that as much light as possible reaches the eye. Sharpness is excellent across the vast majority of the field, with the aspherical optics minimising off-axis aberrations including pincushion distortion and field curvature. I wouldn’t be surprised if the overall light transmission is of the order of 80 to 85 per cent(revised in light of the tranmissitivity of the Zeiss Terra ED pocket glass with a light tranmsission of 88 per cent).

One of my pet peeves is seeing glare in the image when the binocular is pointed at a strongly backlit scene. I was delighted to see that apart from very slight crescent glare  when pointed near the Sun, the images generally remained stark and beautifully contrasted. These good impressions were also confirmed by more stringent tests conducted indoors by aiming the pocket binocular at my iphone torch set to its maximum  brightness. These tests showed that although there was some weak internal reflections  and flare, they were well within what I would consider acceptable. At night, I was able to see that when the binocular was aimed at some bright sodium street lamps, only very slight ghosting was evident. Finally, aiming the 8 x 25 at a bright full Moon revealed lovely clean images devoid of any on axis flaring and internal reflections. Placing the Moon just outside the field did show up some flaring however, but I deeemed the result perfectly acceptable. You can chalk it down that these results are excellent, especially considering the modest pricing of the instrument.

Colour correction was very well controlled in both daylight and nightime tests on a bright Moon. On axis, it is very difficult to see any chromatic aberration but does become easier to see as the target is moved off axis. That said, secondary spectrum was minimal even in my most demanding tests, affirming my belief that a well-made achromatic binocular can deliver crisp, pristine images rich in contrast and resolution.

……………………………………………………………………………………………………………………………….

An interesting aside: My former colleague at Astronomy Now, Ade Ashford, reviewed a larger Opticron binocular- the Oregon 20 x 80 – for the October 2019 issue of the magazine. In that review, featured on pages 90 through 94, he confirmed what I had previously stated about larger binoculars with powers up to 20x or so; there is no need to use ED glass if the binocular is properly made and this goes for both daylight viewing and nightime observations. Below is Ashford’s assessment of the 20 x 80’s daylight performance:

And here are his conclusions:

Moreover, Ashford offers this sterling advice to the binocular enthusiast:

” …..don’t get hung-up on ED glass instruments. A well-engineered achromatic model will perform well, particularly if it uses Bak-4 prisms and its optical surfaces are multi-coated throughout.”

pp 91

Having ED glass counts for nothing if the binocular is not properly made. I would much rather have a well made achromatic instrument than have a poorly constructed model with super duper objective lens elements.

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A fine quality pocket binocular in the plam of your hand.

My Little Aston Martin:

The little Opticron has already accompanied me on a few hill walks, a Partick Thistle FC( sad, I know!) testimonial and numerous rambles near my rural home, where it has delivered wonderful crisp images that never fail to delight. The field of view(5.2 degrees) is a little on the narrow side as pocket binoculars go, but its plenty wide enough for most applications and besides, the distortion free images nearly from edge to edge quickly override any perceived handicap of having a restricted viewing field.

Its tiny size and lack of garish colouring make it the ideal instrument to bring along to sports events, where it doesn’t attract attention from fellow crowd members. The Opticron is also a most excellent instrument to examine colourful flowers, butterflies and other marvels of nature near at hand, thanks to its excellent close focus; measured to be ~51 inches.And because its waterproof, it would also make an excellent companion while sailing or fishing.

The Opticron pocket binocular comes with a very high quality padded pouch to protect the instrument from any kind of rough handling.

Of course, the power of a small, high-quality pocket binocular quickly dwindles as the light begins to fade in the evening, or during the attenuated light before dawn, where a larger field glass really comes into its own. A little pocket binocular like this is far from the ideal instrument for viewing the night sky, but it can still be used for the odd look at the Moon, a starry skyscape or brightly lit cityscape.

I consider weatherproofing to be a sensible and worthwhile addition to any binocular and is certainly welcome on this second generation Opticron Aspheric. The instrument is purged with dry nitrogen gas at a pressure slightly higher than atmospheric pressure. This positive pressure helps to keep out dust and marauding fungi, and the sensibly inert nature of nitrogen ensures that internal components(including the silver coated prisms), will not tarnish or oxidise any time soon. This will only serve to increase the longevity and versatility of the binocular in adverse weather conditions, especially in my rather damp, humid climate. When not in use, I have taken to storing all my binoculars in a cool ( ~60 F) pantry with silica gel dessicant inside their cases. Yep, all my instruments are in it for the long haul.

Quality you can wear.

The Opticron Aspheric LE WP 8 x 25 is an excellent example of how a well made, achromatic binocular can deliver wonderful, sharp and high-contrast images. It is more expensive than many other pocket binoculars, but you most certainly get what you pay for.

 Thanks for reading!

Neil English’s new title, The ShortTube 80; A User’s Guide, will hit the bookshelves in early November 2019.

 

De Fideli.

N=2: Why I’m the Very Proud User of a Barr & Stroud Savannah 8 x 42 Binocular.

An alpha binocular in many ways, except for the price.

Semptember 9, 2019

I’ve said it before, and I’ll say it again: there is something in a name.

In my ongoing investigation into binoculars, I’ve discovered that, like telescopes, you don’t always get what you pay for. In particular, if a product offers advanced optical features like a full multi-coating on all air to glass surfaces, ED elements, or phase corrected roof prisms, it doesn’t necessarily translate into a solidly functioning optic. I’ve tested products purported to have premium optics but upon inspection, did not deliver all the goodness that they were promising in cleverly devised youtube promos and fancy specification sheets etc.

One company that has bucked this trend is Barr & Stroud, a once prestigious optical and engineering firm, established in Glasgow, Scotland, that at one time supplied all manner of optical instruments to the British navy during two world wars. Like many other large optical firms established in Britain, it underwent considerable re-structuring over the decades. Today, the brand name is owned by Optical Vision Limited(OVL) and began producing binoculars for the civilian market in 2011, moving production to China.

My enthusiasm for the brand began just a year ago(2018), when I initiated testing a variety of their binoculars in different price ranges. Like many others who have looked through their instruments, I was duly impressed by the incredible bang for buck of their offerings, with optics that punched well above their modest price tags.

Of particular note is the Barr & Stroud Savannah 8 x 42, which delivered wonderful, wide-field, high-contrast and colour pure images of the Creation. Unlike other brands in the same price range, which offered so-so performance, especially off-axis, these binoculars maintained excellent control of the same aberrations. The massive 8.2 degree field of these 8x glasses is sharp across the vast majority of the field, with only the extreme edges showing significant distortion.

My first Savannah was actually purchased on the second-hand market, and that out of sheer curiosity. Expecting such a wide angle binocular to show average optical quality as one moves off axis(like so many others I’ve tested), I was very pleasantly surprised to discover that this excellent image quality was being maintained to the extreme edge of the field. Indeed, the view, in retrospect, was almost too good to be true. Unfortunately, the dioptre ring, which is situated in a very unusual place on this binocular (just ahead of the large focus wheel) developed a fault, which necessitated its return to OVL for repair. What I actually received was a brand-new instrument and so I was able to asess the performance of two samples of the Barr & Stroud Savannah that inspired the writing of this blog.

Two great performers: the Barr & Stroud 8 x 42 Savannah(left) and the 10 x 50 Sierra(right).

Built like a proverbial tank, the fully weatherproof and nitrogen purged Savannah 8 x 42 is heavier than many competing models on the market. Indeed, at 819 grams, it even weighs more than my 10 x 50 Barr & Stroud Sierra binocular (which also delivers excellent optics and mechanics for the buck). Outwardly, the Savannah has a rather Spartan look and feel about it, with features that are simple and rather understated. The eye cups are of very high quality, which can be set to three positions, and with a very generous 18mm eye relief, is ideal for eye glass wearers and those who like to observe without glasses. When twisted up, they click into place with a reassuringly loud “thwack” sound, and which remain in that position even after excess pressure is applied. Indeed, I rate these eyecups very highly and amongst the best that I have sampled thus far in my binocular education.

The high quality multi-coatings on the 42mm objective lenses of the Savannah. The reader will also note how deeply recessed the objectives are. This helps suppress glare in bright, daylight conditions.

The focus wheel is large and moves smoothly without any stiction, either clockwise or anti-clockwise, making it easy to change the position of best focus from as close as 2 metres to beyond infinity. The tension is just right; not too stiff and not too slack.

All the accessories that come with the Savannah are of high quality; including a hard black clamshell case, a padded neck strap with the B&S logo and rubber objective and eyepiece lens caps that can be affixed to the binocular and so are not easily lost in routine field use. The instrument also comes with the company’s 10-year warranty.

The large and responsive focus wheel on the Barr & Stroud Savannah 8 x 42.

The new binocular turned out to be every bit as good optically than the first one I returned! Indeed, it could even be that little bit better! Images are bright and razor sharp, rich in contrast and colour pure. Though it contains no ED elements, the instrument shows only a trace of chromatic aberration, and only if you go looking hard for it. Like I said before, I don’t consider the presence of ED glass as a feature that is necessary on binoculars of this specification. Crank up the power nearer to the resolving magnification, and it’s a different story. But in this realm, what I’m more interested in, and which is far more important in the scheme of things, is how well the binocular is put together.

Roofs are complex instruments, requiring engineering skill and very careful assembly of the components. Some firms know how to do it well, others don’t…..methinks.

The high quality twist up eyecups on the Savannah click securely into place with a loud “thwack” sound. Note the tough, texturised rubber amouring covering the instrument.

My assessment of binocular optics involves the usual procedures employed by other reviewers, but I have also devised much more demanding tests to learn how well the light is being transmitted though the optical train.  What I have discovered is that many purportedly high-end roof prism binoculars (based solely on their recommended retail price) often show considerable flaring and annoying internal reflections when observing strongly backlit daylight scenes. In addition, night time testing on bright artificial street lights and the full Moon also provide solid clues as to what is going on inside the test binocular(which unfortunately, are all hermetically sealed!!).

One particularly stringent test is to direct an intensely bright beam of light from my iphone into the binocular to see how it deals with glare and internal reflections. No roof prism binocular, no matter how well made, can completely pass these tests;

All fall short:- but what astonished me was how well they were suppressed in the Savannah 8 x 42. Unlike many other models, which reveal too much glare and bright ghosting across the field, both my 10 x 50 and 8 x 42 Barr & Stroud instruments came out with truly excellent results! In particular, the degree of glare suppression and control of internal reflections present in the Savannah was fully the equal of a world class binocular: – in this case, the Swarovski 10 x 42 EL Range:. Where you will often pick up diffraction spikes and flaring from bright street lighting in an inferior instrument, as well as contrast-robbing diffused light around such artificial light sources (not to mention internal reflections), my new Savannah 8 x 42 shows up very little. This is easily seen in regular daylight testing, where the images thrown up by the instrument show very high contrast, allowing very fine details to be easily discerned.

Performing a small, bright light test in the comfort of my living room. Note the small amount of daylight left in the room to asist imaging objects immediately behind and around the light source(my iphone torch).

I thought long and hard about why such an economical instrument offered such unreasonably excellent control of stray light, and then I remembered how the same company made high-quality optical instruments for the British navy. Out at sea, where sunlight is strongly reflected off the water, glare suppression would have been a high priority for any optic used for long distance surveillance. Although it remains an interesting conjecture on my part, it could be that the technicians who assemble such binoculars have specialised knowledge on how to keep those internal light leaks at bay. Afterall, once upon a time, not doing so might well have made all the difference between life and death!

Some important details coming through on the focussing wheel. The ocular lenses are hard coated for extra durability.

Whatever the reasons for such optical excellence, the wonderful colour correction, contrast and suppression of stray light make the 8 x 42 Savannah binocular an excellent choice for birders and naturalists. I cannot think of a better instrument – without dropping an additional few grand – to take along with me to observe the deluge of autumnal colours that are only just emerging, as the trees shut down for a long, winter nap. But, as I’ve discovered, the 8 x 42 also delivers knock-out views of the celestial realm!

As I recall, it was with some trepidation that I decided to try the Savannah. I was leary of the advertised field of view -143m@1000m or 8.2 angular degrees. I had learned of other binoculars delivering such enormous fields of view but having disappointing off-axis performance. Better to have a binocular that delivers a smaller field of view with tightly focused stars near the edge than suffer the indignation of seeing those stars swell up in the outer part of the field. It’s just not tennis!

But my fears were completely allayed once I tried them out on the night sky.  I was literally blown away! Not only was the field of view enormous, but it was very well corrected, right to the edge of the field. Believe me, I have experienced some real howlers, where stars are pinpoint sharp in the centre of the field but when moved off axis, the same test stars balloon into enormous blobs when positioned near the field stop. Starfields remain crisp throughout the field of the Savannah binocular making it an excellent choice for casual star gazing.

Although the binocular can be mounted on a monopod for increased stability, I have rarely used it in this capcaity. Instead, I enjoy hand-holding the instrument where the 8x magnification makes it considerably easier to hold steady over a 10x instrument. That said, if I wish to push the instrument to see the very faintest stars, a monopod is a good way to go. Some binocular authorities I have read suggest that you can gain up to 1 stellar magnitude deeper if the image is stabilised.

The very well corrected, ultra-wide field of the Barr & Stroud Savannah  8 x 42  provides stunning views of large clusters of stars. For example, it provides knock-out views of Melotte 20, otherwise known as the Alpha Persei Association, where the field is littered with several dozen hot, white stars varying in glory from the third to the 10th magnitude. But perhaps my fondest night time experience with this wonder binocular was seeing the entire Sword-Handle and Belt stars of Orion in the same field on a cold, dark December evening.  And where my 10 x 50 Sierra binocular can just frame the Hyades, the Savannah frames the same picturesque asterism with plenty of room to spare!

The large, sensibly flat field of the Savannah has proven excellent for watching meteor showers. I just aim it at the radiant and watch to see if some shooting stars flash across the field. I also love exploring the interface between land and sky. Indeed, as described in this blog, the Savannah is my instrument of choice to explore Moon and starscapes rising above trees and buildings near my home. The Savannah has re-kinded my interest in observing the full Moon when the clouds pass over it. I adore the play of light and colour the binocular serves up in its enormous field of view.

The 8 x 42 is always by my side while using my backyard telescopes. It has greatly increased the speed and efficiency of finding faint fuzzies. Once I locate the target with the binocular, the telescope is pointed at the same spot of sky where I can rapidly hone in on the object.

A binocular that doesn’t want to go inside its hard case.

Readers will forgive my rather vaunted praise of this amazing instrument. But I feel it is justified. In an age of con artists and let downs, this instrument is nothing short of a ray of sunshine. It offers exceptional value for money and has sated my desire to acquire anything else in this mid-sized binocular class. I can hand-on-heart recommend it to other observers looking for an excellent all-round binocular for day and night time use. You’ll not be disappointed!

Thank you for reading!

 

Neil English is the author of several books in amateur and professional astronomy.

 

 

De Fideli.

In Search of a Good Pocket Binocular.

Far from the madding crowd.

August 30 2019

Pocket binoculars are a popular choice for many birders, hikers, ramblers and all-round nature lovers who want to get up-close and personal with God’s illustrious creation. If you have scenery like this right on your door step, trust me, you’ll be keen to take along some binoculars to enhance and extend what your eyes can see;

A pocket binocular usually has objective lenses less than 30mm in diameter and offer magnifications anywhere from 7x to 10x. They are small and in general fit inside a pocket, giving rise to their name. Like all other binoculars, pocket glasses come in a range of prices, starting from just a few tens of pounds right up to £1000, depending on the make and model. The cheapest models are to be generally avoided, as they often have very shoddy optics and/or mechanics, but things get very interesting once you move into the mid-priced market, where you can acquire decent optics and mechanics for prices anywhere from £70 up to a few hundred pounds. But is buying a pocket binocular from a reputable optics firm a sure way to get decent quality? I’m going to have to concede that the answer is “no.”

That’s based on my experiences mainly with two models from the well established companies: Bresser(Germany) and Kowa(Japan). Both models were acquired from amazon and possess similar optical specifications, the Bresser Pirsch 8 x 26mm and the Kowa SV 8 x 25mm DCF, which set me back £97.00 and £83.00, respectively. Both models are roof prism designs, have fully multi-coated optics and phase corrected prisms to maximise the amount of light that is transmitted to the eye, and to render colour-true images in bright daylight conditions.

The Bresser Pirsch 8 x 26mm was exciting to unpack, as it looked the bizz from the online images and the specifications promising “premium quality worthy of their prestigious lifetime warranty.” And when I opened up the case to have a look at the binocular, I must admit to being instantly impressed; here was a stylish looking instrument with a beautifully made, ‘Swarovski like’ open bridge design. The focuser was large and constructed from high quality metal. In operation, it was a joy to use, moving with silky smoothness, with no stiction when turned clockwise and anti-clockwise through its travel.

The Bresser Prisch 8 x 26 compact binocular.

All the accessories were of high quality, which included a padded next strap, an oversized nylon case, instruction manual, rubber objective and eyepiece covers, and a lens cleaning cloth.

The twist up eyecups are amongst the best I have encountered, clicking through a number of stages from fully retracted to fully extended.They hold their positions very well, even when significant pressure is applied to them. The dioptre setting is situated in a sensible place; just under the right barrel. It is stiff and once set in place it will not easily budge.

The beautifully designed twist up eyecups are amongst the best I have personally encountered with four positions. Here they are shown fully extended.

Handling this binocular was particularly pleasurable, as the open bridge design allows for firm gripping either with or without gloves, and can easily be focused using one or two hands. The binocular is lighter than it looks: ~ 290 grams

Firm grip: handling the Bresser Pirsch 8 x 26 binocular.

The Baader Pirsch 8 x 26 has outstanding mechanical quality.

The instrument comes with quality accessories, including a padded cary case and quality neck strap.

But mechanics are only half the story of any binocular. How did the optics fare?

Collimation was tested by mounting the binocular securely on a monopod that was firmly sandwiched in place between two planks of wood on my garden fence, and examining the fields of view presented by both barrels of the instrument. This showed that the binocular was indeed well collimated, certainly within factory tolerances. I had no trouble instantly merging the images once the optimum IPD was selected. Close focus was estimated at about 6.5 feet, in line with the stated specifications. So far so good.

The quoted eye relief for the Pirsch binocular is 15.6mm. That should have been plenty good for eye glass wearers. However, I found that only by pressing my glasses hard against my eyes could I observe the full field. It was not comfortable and so I think folk that have to use eye glasses when using this binocular will struggle.

Testing collimation of the Pirsch binocular. And yes, this wee instrument does have a tripod connecting thread!

True to the specifications, the binocular offers a fairly wide field of view. I measured it as about 6.6 degrees(in agreement with its stated FOV of 117m@1000m). Compared with an entry level test binocular with no phase coating(but with fully multicoated optics), the image was better corrected for seidel aberrations across the field of view, revealing noticeably less field curvature, pin cushion distortion and lateral colour than the entry level unit. On axis, no chromatic aberration could be seen at the edges of a nearby telephone pole as seen against a bright, overcast sky, while the control did show a little bit. And while the image looked good in many daylight scenes, it wasn’t long before I discovered that the binocular was not showing the contrast I had been enjoying with my wife’s Opticron Aspheric LE 8 x 25mm pocket binoculars. Looking into brightly backlit scenes revealed a potential problem with the Pirsch; there was some flaring and internal reflections coming through. So that caused me to investigate the matter further.

A cursory examination of the binocular review literature revealed something rather shocking to me. Very few reviewers had the presence of mind to investigate and report back on light leakage within the binocular, which can lead to very incomplete knowledge on how an instrument ought to behave under real-life situations. I consider it essential information for any savvy buyer, as it doesn’t matter how well a binocular is appointed with high-tech features if they can’t manage to adequately suppress stray light in the optical train. To me, this is Optics 101.

Fortunately, this is easily done by carrying out an indoor test using an iphone with its torch turned up to its maximum brightness and examining the in-focus images of how that light is delivered to the eye whilst looking though the binocular in a darkened room a few metres in the distance. You can also glean good information on how well a binocular will deliver by pointing the instrument at a bright street light or the full Moon(this is a considerably less severe test but an important one in any binocular assessment).

Well, the tests were very convicting. Not only was there many bright internal reflections but the Pirsch binocular seemed to be causing bright light sources to become diffused across the field of view, manifesting as a contrast-robbing, circular haze. And it was the same when I pointed the binocular at a bright sodium street light.  I had not seen such terrible control of stray light since the day I tested a very inexpensive Celestron Nature DX 8×25 unit several months back. Needless to say, I was not a happy bunny! Incidentally, even my entry-level control optic showed far less flaring and internal reflections than this purportedly “premium” instrument!

As another control for these tests, I employed my most excellent Barr & Stroud Savannah 8 x 42, which shows remarkably little flare and diffusion of light under the same conditions. Indeed, as I already communicated in a previous blog, this superb instrument possesses the same level of glare and internal reflection control as a Swarovski EL Range 10 x 42 unit I recently subjected to the same tests. The reader will note however, that no roof prism binocular, no matter how well built it is, can completely eliminate such optical side effects.

My control binocular for flare and internal reflection testing; the Barr & Stroud 8 x 42 wide angle, which delivers superbly contrasted images even in harsh lighting conditions.

A curious aside: I wonder will flare and internal reflection testing suddenly enjoy an upsurge on future binocular forums? Hmmm.

I suspect that many of these pocket binoculars are not tested for flaring and/or internal reflections because these small instruments are not recommended for night time use and so any problems they have in this regard might easily slip below the radar. I would check out your instrument to see how it fares in this regard.

For me, a binocular, no matter how small it is, should pass these tests. Remember, we’re not looking for perfection here. If you’re viewing a city scape at night or gazing at the Moon from time to time, your pocket binocular should have minimum light leak and scatter, so that it does not show up in ordinary use. Is that really too much to ask for?

I don’t think so!

Verdict: The Bresser Pirsch 8 x 26 possesses excellent mechanical features but its optics do not match its mechanics. Not recommended. Luckily I had registered the instrument with Bresser to enable the terms of the guarantee to be fulfilled.

So how did the Kowa SV 8 x 25 fare in comparison?

Here is what the company promised.

Well, the package I received came in a small box, containing the binoculars, instruction manual, carry strap and eyepiece caps but no objective covering caps. Unlike the Pirsch, the Kowa is double hinged, which enables you to fold the barrels under the bridge,. making it truly pocketable. You can get an idea of the transportable size difference of both the Pirsch and the Kowa by comparing the size of their carry cases;

The carrying cases for the Pirsch(right) and Kowa binocular(left).

My first impressions of the Kowa SV 8x 25mm binocular were favourable. It is small and rather cute looking. Kowa engineers deliberately designed the instrument to be very lightweight using modern materials. It has a very well armoured body with a tough, coarse- feeling rubberised exterior.

The Kowa SV 8x 25 is a well made binocular using modern materials to reduce the weight. Like the Pirsch, the dioptre setting ring is under the right barrel.

The eyecups twist up and down like the Pirsch  but appeared to have only two fixed settings; fully extended or retracted.  You can however, set the eycups at any position and they will hold their place.

The Kowa glass had what seemed to be immaculately applied anti-reflection coatings on the eye lenses and objectives, which almost disappear when examined head on. Kowa also apply a hydrophobic coating on the elements that allegedly repels water, oil etc, making cleaning the exterior optics that little bit easier.

The kowa ocular lenses have nice anti-reflection coatings. Note the smaller eye lenses on the instrument.

And here is what the objectives look like under inspection. Kowa engineers applied extra armouring around the nicely recessed objectives for added protection.

The objective lenses on the Kowa are nicely recessed and have immaculately applied anti-reflection coatings.

The focuser is made of a soft material that effortlessly moves clockwise and anti-clockwise. I found that it was smooth and very responsive in use, with little in the way of stiction.

A close-up of the Kowa focuser.

Like the Pirsch, the instrument is fully waterproof and is nitrogen purged. The optics are fully multi-coated and a phase coating applied to the Schmidt-Pechan roof prisms. But at this stage in the game, I had learned not to place my hope in an instrument based solely on these claims. I recalled the story of the little Celestron Nature DX which also advertised such advanced optical treatments, but failed miserably in field use.

Like the Pirsch, the Kowa barrels were well collimated and the field of view was found to be slightly smaller than the Pirsch, at just over 6 degrees. But when I began to assess the optics of the unit, I hit my first snag. The smaller eye lenses on the instrument made it very difficult for me to accurately position my eyes and I immediately noticed that I was frequently experiencing black outs as I moved from one daylight target to another. It did have better eye relief than the Pirsch though, allowing those who wear eyeglasses to use it fairly easily.

Worse still, I noticed that when I was observing with the Kowa in bright daylight conditions outdoors, I could see a faint ghosting in the field which would only vanish when I pressed my eyes tightly against the eyecups. The contrast was noticeably better in the Kowa images though, with excellent control of colour and seidel aberrations. But I was worried about the ghosting I saw, and so decided to perform my iphone torch test to see what was what.

Such testing revealed some problems. While the horrible diffused light I saw in the Pirsch was far better controlled(but nonetheless present), the test revealed a pretty bad case of on-axis flaring. My heart sunk as I contemplated the implications of the test. This would also show up in nightime test I told myself, and I waited until the evening to find out for sure.

Turning the unit on a bright sodium lamp all too easily revealed a pretty bad dose of on-axis flaring which ruined the image. And though internal reflections were much better controlled in the Kowa than in the Pirsch, the flaring on bright nocturnal lights was, quite frankly, very annoying and downright unnaceptable. And yet again, my entry-level control binocular fared better than the prestigious Kowa in the same tests.

I really hoped Kowa, a company which enjoys a strong reputation for precision, high-end  sport optics, would be able to deliver a binocular image without this degree of flaring, but  alas, it was not to be.

Visibly upset, I contacted Kowa UK to report the result. They quickly responded and apologised to me for the fault, explaining that this was a very ” unusual” finding.

Well maybe. But it didn’t stop me immediately packing up the instrument and its accessories and returning it to amazon. I received a full refund, but had no interest in  testing out a replacement unit. Once bitten twice shy.

Note added in proof: Control of light leakages bares little correlation to the price paid for these binoculars. For instance, my Barr & Stroud 8 x 42 and 10 x 50 roofs have a retail value of about £130 and £80, respectively, but have excellent control of stray light. If these did so well, why couldn’t the little pocket binoculars deliver?

Ich verstehe nicht.

Another pretender:

Same old same old: the Olympus 10 x 25 has the same optical design as the Kowa SV pocket binocular.

What about the Olympus 10 x 25 WPII?  I took a chance on this product also. Retailing for about £70, it offered all the same features as the Kowa binocular. Indeed it was almost a carbon copy of the Kowa, except for the magnification and focus wheel, but alas it also showed too much daylight glare when pointed at brightly backlit objects, so that went straight back to amazon as well. Though sharp in the middle of its relatively massive field(6.5 angular degrees), the Olympus binocular showed very distorted images in the outer 30 per cent of the same portal. So, not great, either.

An Old Reliable: It’s not all doom and gloom though. Compared with the three binoculars I had evaluated thus far in this blog, my wife’s Opticron LE Aspheric 8 x 25 pocket binocular is in a completely different league optically. With minimum flare, no blackouts and good control of internal reflections, the little classically styled Opticron is very well built and just works, time after time after time.

A classically styled pocket binocular that just works; the Opticron LE Aspheric 8 x 25.

Now a few years old, the Opticron LE Aspheric features multi-coated optics and silver- coated phase corrected prisms. Aspherical ocular lenses produce a very flat field that renders undistorted images right to the edge of the field. And though its field of view is a little restricted at 5.2 angular degrees, it’s a nice tidy portal with very well defined field stops.

The Opticron Aspheric LE has simple twist up eyecups for those who do not use eyeglasses while observing.

The eyecups have just two positions; up or down. With 21mm eye relief, the instrument is extremely comfortable to view through. The double-hinge design does allow the barrels to fold up to pocket size though;

Snug as a bug in a rug.

It has its own built in lanyard so there is no need to fiddle about attaching a neckstrap. The original Opticron Aspheric LE (with the green logo) is a bit on the urbane side though; it is not weatherproof and the outer armouring is smooth and non-texturised. But a few years back, Opticron gave this pocket binocular a bit of a makeover; the new Aspheric LE is waterproof and purged with dry nitrogen, making it that little bit more versatile than the first generation model. Eye relief is reduced to 16mm, which should still be plenty good for all users. It also has new eyecups and a  re-designed focuser. Details can be found here.

Nice big(17mm) eye lenses on the Opticron Aspheric LE make for highly immersive views.

The instrument is more expensive than the Pirsch and Kowa models though; ~£120. But that extra cost does buy you peace of mind, or so I’m led to believe.

I”m going to order up the new model to determine how consistent the quality is. I will report back in a wee while to tell you how I get on with it.

Watch this space!

September 10 2019: Well the new Opticron pocket binocular arrived safely today. So, what was in the goodie box?

The Opticron Aspheric LE WP 8 x 25 pocket binocular and its accessories.

The binocular was purchased from Tring Astronomy Centre, and I elected to have it shipped to me via expedited 24 hour delivery. The cost, including postage, came in at £120. Like everything else I have received from Tring in the past, the product arrived in perfect nick. It was double boxed, witth the package including the pocket binocular, an instruction manual, lens cleaning cloth, and warranty card, and a stylish padded carry case with the Opticron logo on the front. I even received a £75  wine voucher!

The New Opticron Aspheric LE is now water and fog proof.

Unlike the original model, the make and specifications on the new model are embossed on the upper bridge. The armouring is also slightly more texturised than the sleeky, first generation model.

The original model had plastic eyecups, but the newer incarnation has what appears to be a slightly more comfortable rubberised overcoat.

Using the Optricon Aspheric LE WP is child’s play; just twist up the eyecups and they click into place. There are no intermediate settings. If you wear glasses, leave the eyecups down.

I rather like the simplicity of the eyecups on this instrument. There are only two positions: fully extended or fully retracted. The 16mm eye relief is plenty good enough for eyeglass wearers(verified by my own tests).

The focus wheel is larger and a little easier to work with than the original model.That will make it easier to use with gloves on. I did find it to be a wee bit on the stiff side though, but I figure with more use, it will became easier to negotiate.

The newer Opticron Aspheric LE( right) has a slightly larger focusing wheel.

The ocular lenses are the same on both models; good and large and easy to engage with.

Both models have the same optics, including large ocular lens.

The neoprene carry case is very nicely made and fits the pocket binocular perfectly:

A very nicely fitting padded neoprene carry case will keep your optics safe while not in use.

Close up of the Opticron labelled padded case.

You can probably guess by now what I did first: yep, I performed my torch test to see how well stray light was being controlled inside the barrels. Well, it passed with flying colours; not perfect, but perfectly acceptable! Indeed, it was very similar to the results I obtained for the original model. Later, I performed a test on some sodium street lights and the results were very good. Only very slight ghosting and no annoying glare.

What a relief!

Conducting some observations during the day also delivered very pleasing results.The images are very bright, sharp and colour-pure, thanks to good quality glass, anti-reflection coatings and a silver mirror coating on the prisms. Like the original model, backlit scenes show excellent control of glare and certainly enough to satisfy the vast majority of users. The aspheric ocular lenses did a great job maintaining a very flat field nearly all the way to the field stop. Close focus was astonishing! I measured it at just 51 inches (~1.3m), so significantly less than the advertised 2 metres. A nice bonus!

Clearly the quality control on these instruments appears to be very good indeed.

Weighing in at just 291 grams, and with its double hinge design, folding it up and storing it in your pocket is a breeze. It’s nice to have a pocket binocular that does exactly what it says on the tin.

Alas, I was unable to perform my last test on the bright Moon owing to the presence of a weather system (the remnants of hurricane Dorian) passing over Scotland, but the results on stray ligt control gives me no cause to be concerned. It will pass the full Moon test with flying colours!

A quality pocket binocular in the palm of your hand!

A Curious Aside: Here’s a binocular review posted on September 11 2019.

Wow!

The reviewer even conducted tests for glare and flaring etc!

Shockeroonie!

Don’t take my word for it; look at some other reviews of the Opticron Aspheric LE pocket binoculars to better establish a consensus:

Calvin Jones, Irish author, birder and naturalist

Diane and Michael Porter’s Birding Binoculars

Feathersoptics review

 

Conclusions and Lessons Learned:

It is clear that good optical performance cannot be gleaned from checking the specifications of a pocket binocular. Claims of a product offering fully multicoated optics and phase corrected prisms etc count for nothing if they cannot suppress glare and internal reflections to an acceptable degree. In this blog I have sampled but a few models that fell short of my expectations. In the end, only the Opticron Aspheric LE 8 x 25 delivered the readies.

The best way to proceed with acquiring a pocket binocular is to test it out in person, if at all possible, before handing over your hard-earned cash. The reader should also be leary of any binocular review that does not mention or test for glare, flare and internal reflection. This is an essential feature that must be controlled if you are to derive the best performance out of your pocket optics.

Life’s too short to look through bad glass!

Opticron also manufacture a series of more expensive pocket binoculars in their BGAT PC Oasis series. These will also be a good bet, but you’ll have to cough up another £100 to acquire one. I may test one of these models out in the future.

I did consider a few ED models in my quest. For example, the Hawke Endurance ED 8x 25 has a wider field of view and retails for 20 per cent less than the Opticron(which has no ED glass), but is it as well built? And how do the optics fare? To be honest, I don’t know, as there wasn’t any discriminating reviews available for me to make a decision, but they might be worth a punt. I did contact Hawke asking them how well they suppress glare in their small pocket binocular and received a very quick reply. Here is a copy of my correspondence with the company:

……………………………………………………………………………………………………………………..

Dear Sir/Madam
I am writing to inquire about glare suppression and internal reflections in your Hawke Endurance 8x and 10x 25mm pocket binoculars.
I have been testing a few brands and some show very annoying flare and/or ghosting when pointed at a bright street lamp or a bright Moon.
Will your products pass such tests?
I appreciate that no binocular can completely eliminate these but all I am asking for is no obvious ghosting when pointed at the moon or strongly backlit scenes in daylight.
Thanks in advance of your reply.
Sincerely
Neil English.

from: Hawke UK uk@hawkeoptics.com

Hello Neil,

Thanks for your email and interest in Hawke Optics. The internal components of our binoculars are treated to be as glare resistant as possible. We use a combination of matte finishes and ribbed surfaces to prevent a flat reflective surface. However, it will never be possible to completely eliminate reflections like you are talking about and so even with these countermeasures, our binoculars will show some white out when looking towards a bright light source.

Kind regards,

Alex Jenkinson

……………………………………………………………………………………………………………………………….

I wonder if any of you have tested the Hawke model? If so, I’d be very keen to hear from you. Failing that, I might just go ahead and purchase one to do a full review; warts and all.

I would also trust the optics in the Pentax AD bocket binocular, which also retails for about £100. But that’s not based on direct experience with this model, only an inference made from using two other binoculars from their line.

For a few hundred pounds more you can acquire excellent pocket binoculars from the ultra-premium end of the market from Zeiss, Leica and Swarovski. However, I don’t think you’ll notice any big optical differences between the Opticron and these though. The value lies more in their mechanics than anything else.

For me, I feel the Opticron delivers everything I could wish for in a pocket binocular; both mechanically and optically. It’s a quality product that will stand the test of time if looked after properly.

Well, I hope you found this blog to be informative.

Good luck with your quest to find a good pocket binocular!

 

Neil English’s newest title, The ShortTube 80: A User’s Guide, hits the bookshelves in early November 2019.

Post Scriptum: Shortly after local midnight on September 12 2019, I ventured outside to see if I could gain a glimpse of the bright and nearly full Moon, that had just past the meridian and about 17 degrees above the southerly horizon. I compared the Bresser Pirsch 8 x 26 to the Opticron Aspheric LE WP 8x 25. A brisk westerly breeze was blowing, quickly shifting the clouds over and then away from the Moon. During one such clear spell I pointed both instruments at its silvery white face and studied the images.

Result: The Pirsch showed annoying glare and some obvious internal reflections in the field. The glare also brightened the backround sky around the Moon, reducing contrast. However, the Opticron unit showed no visible internal reflections and only slight flaring when the Moon was placed just outside the field. The backround sky around the Moon was much darker to boot, showing clearly superior image quality to the “premium” Pirsch.

 

De Fideli.

The Field of Glory.

Companion under the stars: the Pentax PCF 20 x 60 binocular.

Preamble

Visual astronomy can be enjoyed in a variety of ways. We can use the eyes our Creator designed for us to marvel at the beauty of the night sky. Or we can employ a telescope to get those up-close views, where both resolving and light gathering power are needed to make sense of what we see. But there is also the binocular perspective, which fills a niche set midway between that of the eye and that of the telescope.

On the night of August 25 2019, I found myself doing all three. After an hour of admiring dim and hard to find deep sky objects using my largest telescope; a 12″ f/5 Newtonian reflector, I sat back in my observing chair to drink up the naked eye heavens above me. The air was still, with no wind, and only the occasional screech of a barn owl breaking the silence. After a few months of twilit skies with only the brightest stellar luminaries on display, true darkness had now returned to the landscape. By 11:30pm local time, the bright constellations of Cygnus, Lyra, Hercules and Aquila had passed into the western hemisphere, with Bootes now sinking perilously close to the western horizon. And over in the northeast, Cassiopeia, Perseus and Auriga were making excellent progress climbing ever higher in the sky.  Andromeda and Pegasus were also ripe for exploration. The familiar asterism of the Plough hung low over the northern horizon, far below the North Star, Polaris, around which the great dome of the sky wheels. With no Moon in the sky, and good transparency, the river of light from the northern Milky Way stood out boldly, snaking its way across the heavens from east to west. It was the perfect opportunity to break out my big binocular, a Pentax DCF 20 x 60 and boy did it deliver the readies!

Using a monopod for big binocular astronomy on the go.

As I described at great length in the preamble linked to at the beginning of this blog, the Pentax DCF 20 x 60 combines excellent optics with great mechanical features in a relatively light weight package; ideal for use with a monopod. The instrument attaches in seconds to a strong, high-quality ball and socket mount head and can be transported easily from one place to another. Delivering a pristine, flat field some 2.2 degrees wide, the Pentax had already delivered gorgeous views of the heavens during Winter and Spring evenings, but I had not yet had an opportunity to sample the skies of late Summer/early Autumn with this powerful optical instrument.

My first target was M13, easily found about one third of the way from Eta Herculis to Zeta Herculis in the western edge of the famous Keystone asterism. I had already admired this big and bright globular cluster earlier in the 12″ telescope at high power. The 20 x 60 binocular revealed a bright fuzzy bauble about half the size of the full Moon and neatly sandwiched between two 7th magnitude field stars. Of course, the binocular could not compete with the majesty of such a cluster as presented in a large, light bucket, but it was nonetheless a lovely sight with wonderful contrast against a jet black sky.

I then moved over to Lyra and centered the bright summer luminary, Vega, shining with its intense blue-white hue across the sea of interstellar space, and surrounding it a swarm of fainter suns, including the famous Epsilon Lyrae of double star fame. Moving into Cygnus, I turned the binocular on Beta Cygni, known more commonly as Albireo. With a steady hand, I could easily resolve the beautiful, wide colour contrast double star; marmalade orange and blue-green secondary. Panning about eight degrees due south of Albireo the binocular field soon captured that remarkable little asterism that is the Coathanger (Collinder 339). What makes this a particualrly engaging visual sight is the uniformity of the stars comprising it; most shining with a soft white hue and of the sixth magnitude of glory.

Moving about five degrees to the east of the Coathanger, and forming a neat little right-angled triangle with the stars of Saggita, the celestial Arrow, I chanced upon the large and bright planetary nebula, known commonly as the Dumbbell (Messier 27). Unlike other planetary nebula, M27 is one of the few that present clearly in the relatively low power view of the binocular. Try as I might though, I could not see the hourglass shape of the nebula as seen in telescopes at higher power; it was more or less circular in form, softly glowing against the background sky at magntude 7.4.

I didn’t have to travel far for my next visual treat; M71, a faint globular cluster situated nearly exactly midway between Gamma and Zeta Saggitae. With its population of mostly 12th magnitude suns, M71 presented as a misty patch in a glittering hinterland of August star light.

Adjusting the ball & socket head of the monopod, I ventured back into Cgynus and centred the lovely binocular double,  commonly referred to as 0^1 Cygni. Like a wider version of Albireo, the 20 x 60 binocular presented their fetching colours perfectly, orange and turquoise (magnitude 3.8 and 4.8, resepctively). I could not however clearly resolve the fainter 7th magnitude component parked up against the orange member, which a small telescope so easily shows.

Eager to examine another stellar hinterland, I moved the binocular so that Deneb was centred in the field of view. Well, this binocular portal took my breath away! Hundreds of suns of varying degrees of glory smattered haphazardly across the field, and here and there the excellent contrast of the instrument also showed up some small nebulous patches set adrift among the starry hosts. With its very generous 21mm of eye relief, the big binocular was delivering very comfortable and immersive views. It was almost as if I could reach out my hand and touch the heavens!

With midnight approaching, I noticed that the great square of Pegasus was clearing the rooftop of my house, and a little further to the east, Andromeda, the Chained Lady, had by now gained a decent altitude. Eagerly, I trained the binocular on a foggy patch clearly seen with the naked eye. I had arrived at the Great Andromeda Galaxy (M31). The lenticular shaped core was big and bright and beautifully contrasted against a sable sky, and with averted vision it was not hard to trace the spiral arms all the way to the edges of the field. Its fainter companions, M32 and M110, were also seen with a concentrated gaze, the former being easier to see and just a half an angular degree to the south of M31. M110 proved much more elusive though, being larger and fainter than M32 but nonetheless fairly easy to pick off about a degree away to the northwest of the main galaxy.

Moving into Cassiopeia, the binocular presented field after field of brilliant starlight with a wonderful variety of colours. Many faint open clusters came to life as I inched the binocular through its mid-section; NGC 457(otherwise known as the E.T. Cluster) was very engaging, especially the bright, 5th magnitude white super-giant star marking its southern border, and then on into the heart of M103, a compact little open cluster just to the northeast of blue-white Delta Cassiopeiae. My notes from a good few years back informed me that the cluster presented as unresolved in an inexpensive 15 x 70 binocular, but this instrument, with its significantly higher magnification, was just beginning to hint at some individual stars within the cluster. A comely quartet of stars flanking the southeastern corner of the Messier cluster made the scene especially engaging to study. Panning very slowly eastward through the constellation, roughly from Delta to Epsilon Cassiopeiae, my eyes picked up many faint open clusters, including NGC 44, 663, 559 and 637.

By about a quarter past midnight, Perseus had risen to a good height above the northeastern horizon, and I eagerly sought out the famous Double Cluster(Caldwell 14), easily located as a foggy patch to the naked eye roughly mid-way between Perseus and Cassiopeia. With great excitement, I moved in on my target, all the while bringing to mind the stunning views I had reported with this binocular last Winter. Wow! I wasn’t disaapointed. The entire field exploded with stars of various hues; white, blue-white, creamy yellow and sanguine, the two sumptuous open clusters beautifully resolved with curious fans of stars radiating outwards from their centres. Sharpness was extreme from edge to edge, with the stars presenting as tiny pinpoints. I believe that this 20 x 60 binocular renders these awesome natural spectacles as good as you’ll ever see them; the combination of decent light gathering power and magnification using both eyes is a match made in heaven! This was a pre-season teaser though. The Double Cluster will only increase in majesty, as it continues to climb higher in our skies over the next few months.

Moving to Algol, the Demon Star, I then navigated about 5 degrees west from it, where I was pleasantly surprised by how easily I was able to pick up another lovely open cluster, M34. The powerful double eye on the sky resolved a few dozen members, mostly 7th, 8th and 9th magnitude members sprawled across an area of sky roughly the size of the full Moon. Many fainter members, largely unsresolved by the instrument, gave the cluster a very lively, translucent appearance, a consequence I suppose of the inability of the binocular to cleanly resolve its faintest members, which go all the way down to magnitude 13. Sometimes, not seeing things clearly adds to the visual appeal of deep sky objects.

From there, I moved back to Alpha Persei and placed it at the upper edge of the field of view of the 20 x 60. Even though the binocular has a fairly restricted 2.2 degree true field, it was able to pick up a generous assortment of bright O-B stars at the heart of the moving cluster Melotte 20. It was a beautiful sight!

With the time fast approaching 12:30 am, I picked up the 20 x 60 astride its monopod and moved to the front of the house, where my gaze met with the Pleiades rising above the Fintry Hills to the east of my home. Though it was still at a fairly low altitude, the 20 x 60 produced a draw-jopping view of this celebrated open cluster, its orientation being rather lobsided compared with how it appears later in the autumn. Many of its fainter members were extinguished by virtue of its low altitude, but it was still a magnificent sight. Again I would concede that large binoculars produce the best views of the Pleiads. And it will get better, night by night, as Autumn turns to Winter.

With a waning crescent Moon not far away from rising, I retired from the field of glory with a head full of vivid memories. This was just the beginning though. God willing, it will show me even grander sights as the days continue to shorten through the autumnal equinox and onwards toward the December Solstice.

 

Neil English’s new book, The ShortTube 80, A User’s Guide, will soon be published by Springer-Nature.

 

 

De Fideli.

Test Driving the Swarovski EL Range 10 x 42 Binocular.

The Swarovski EL Range 8x 42 binocular.

For more than a generation Swarovski Optic has been supplying premium quality sports and nature optics to an international customer base. Beginning back in 1935 when Wilhelm Swarovski started manufacturing small 6 x 30 binoculars, his business expanded greatly during World War II and by 1949, Swarovski launched itself as a separate company, manufacturing very high quality binoculars, spotting ‘scopes and rifle sights at their large facility at Absam, Austria. Employing more than 800 employees, Swarovski has a turnover of in excess of 100 million Euro with 90 per cent of its revenue generated from exports.

Swarovski produce a very extensive range of premium quality binoculars for birders, hunters and nature enthusiasts, ranging from small pocket-sized instruments(8 x 25) right up to large 56mm aperture instruments for specialised, low light work.  Having recently re-kindled my interest in using binoculars, I have had the privilege of enjoying two Swarovskis, an older EL 8.5 x 42mm (owned by my coalman, Graham) and a first generation EL Range 10 x 42mm, owned by a neighbour of mine (Ian), both of whom are keen hunters. In this blog, I wish to discuss the latter instrument in some detail.

Introduced in 2011, the EL Range 10 x 42mm features top-notch optics and state-of-the art laser-based range-finding technology that enables the user to accurately estimate distance to any given distance between about 33 and 1500 yards with an error of just +/- 1 yard. In addition, its built-in inclinometer allows angular measurements up to 90 degrees, thereby covering every angle compensation you are likely to use (especially when hunting in mountainous regions). Powered by a CR2 lithium ion battery, up to 1000 measurements can be made before replacing it. The second generation of the EL Range series was introduced in 2015, which offers some improvements over the original, including faster estimation of distance.

Ian very kindly allowed me to borrow his first-generation EL Range 10 x 42 for a short spell. For my tests, I concentrated solely on the optical and mechanical performance of the instrument, which were conducted over the space of 24 hours between July 22 and 23 2019, which included indoor, bright daylight, dusk and night-time observations. For those of you who wish to learn more about its ranging capabilities, check out this link.

The Swarovski EL Range 10 x 42: optical and mechanical excellence.

Mechanical design: The EL Range 10 x 42 weighs in at about 32 ounces. This was surprising given the presence of two prominent arches placed on the underside of the instrument. These apparently increase the stability of the instrument when making hand-held distance estimates.

The underside of the EL Range 10 x 42 has raised arches to help stabilise the instrument while conducting distance measurements

The 10 x 42 Range has individually tunable eyepieces with the dioptre compensation is accessed by pushing up the ring at the base of each ocular. The twist up eyecups are a work of art, plain and simple. Beautifully made, they click up and down effortlessly and hold their positions even when considerable downward force is applied. They can also be unscrewed if they need to be replaced or to access the ocular lenses for cleaning.

The exceptionally well designed all-metal twist up eyecups are a joy to adjust with soft rubber  eye contacts to make viewing as comfortable as possible.

The focus wheel is also a joy to use. With very finely machined threads, focusing from nearby to far away objects is effortlessly achieved via its buttery smooth motions.

The beautifully designed large central focus wheel is buttery smooth with no stiction.

Like all other mid-sized binoculars by Swarovski, the instrument has an open bridge design which is very stable and easy to balance and the well-designed hinge allows for quick and easy adjustment for my optimum inter-pupillary distance. The optics are housed in magnesium barrels to reduce overall weight and are overlaid by a tough, protective rubber overcoat that is very easy to grip. The optics are hermetically sealed and nitrogen purged to prevent any internal fogging. The instrument is water resistant to depths of up to 13 feet.

Overall, I would rate the mechanics on this binocular to be of exceptionally high quality.

Optics: Just like its mechanical excellence, Swarovski spare no expense incorporating the very finest optics inside their binoculars, and by that I mean the highest quality optical glass(which includes extra-low dispersion components) and state-of-the-art anti-reflection coating technology. The prisms are of Bak-4 Schmidt-Pechan design, which require phase coating to optimise light transmission. Swarovski like to think of the entire optical system acting as one collective unit which they call “Swarovision.” The light transmission is 91%( a figure derived from their technical data).

The objective and ocular lenses immediately exposed to the air are also treated with a proprietary coating that repels water, oil and grease. They also will not fog up on cold days if one accidentally breathes on them.

The state-of-the-art anti-reflection coatings of Swarovski objectives. Note also the deeply recessed objectives which cuts down peripheral glare during field use.

After I had made adjustments to the dioptre settings for my own eyes, I excitedly began tests on the 10 x 42 during bright evening sunshine. Examining a range of targets including the top-most boughs of some nearby conifers, rooftops and the broad tree trunk of an old Horse Chestnut tree, I was most impressed at the crystal clear clarity of the images. Comparing these to my own Barr & Stroud Savannah 8 x 42 binocular, which gives a ‘warm’ tone, the Swarovski was more neutral toned in comparison and ever so slightly sharper to my eyes. But what most impressed me was that the image was also a little brighter than my 8 x 42! This became more apparent as the sun began to set and dusky twilight ensued.  If the Swarovski was transmitting 91 per cent of the light collected to the eye, the Savannah was probably transmitting something more like 85 per cent.

Comparing binocular views can be very enlightening. Top: the Barr & Stroud 8 x 42, bottom: the Swarovski EL Range 10 x 42 .

The field of view of the Swarovski is 6.4 degrees, the images being perfectly flat across the entire field thanks to specially designed field flatteners in the ocular lens assembly. This makes the field stop stand out that little bit more than in my 8 x 42 wide-angle Savannah (sporting an 8.2 degree true field). Examining the edge of a telephone pole some 30 yards in the distance revealed a sliver of chromatic aberration in the Savannah but I could discern none at all in the Swarovski.

Edge of field correction was also superior in the Swarovski. Where the Savannah clearly revealed some pin-cushion distortion at the extreme edge of the field, the Swarovski revealed little or none in comparison.

Going indoors for a while, waiting for the sky to get maximally dark, I conducted my iphone torch test to see how both instruments would compare in regards to their ability to suppress internal reflections. This is a severe test on any optic. I darken the room and turned my iphone torch on at maximum brightness. Then, viewing from a comfortable distance, I aimed both instruments at the light to see what was what. A while back, I had tested the Barr & Stroud Savannah 8 x 42 (and the 10 x 50 Sierra made by the same firm) and noted how well they suppressed glare and internal reflections. To my delight, I found both the Swarovsji and the Savannah to reveal broadly similar results; both units very aggressively blocked annoying internal reflections! Note that this test is far more severe than pointing the instruments at a bright Moon. Indeed, some instruments(including some top of the range models) that passed the Moon test faired considerably worse in this more discriminating test.

Star testing and an encounter with a waning Gibbous Moon:

At this time during the summer, the twilight which dominates during late May, June and the first half of July begins to give way to significantly darker skies. So around local midnight, I ventured out again to test the binoculars on some starfields poking through some cloud banks that were beginning to break up as the night progressed. lying on my recliner, I aimed the binoculars on some star fields in Lyra and Cygnus. The view through both the Swarovski and the Savannah was excellent, with the former offering a flatter field from edge to edge. Contrast was excellent in the Swarovski as well, and the stars presented as tiny, sharp pinpoints. It also reached that little bit deeper than the Savannah as one would expect in comparing an 8x optic to a 10x optic of the same aperture. The Savannah, although possessing a wider field of view, also showed some distortion of the stellar images at the edge of the field.

At around 00:45 UT, a bright waning gibbous Moon was rising in the eastern sky and had gained enough altitude to see it from my back garden. Both instruments presented very pleasing views, but with the subtle differences in colour tone and image scale. The Savannah produced a warmer tone with a very slight yellowish tinge in comparison to the Swarovski, which was correspondingly cooler and a more neutral white appearance. The low altitude brought out the usual atmospheric refraction in both instruments. In the Savannah, a very slim sliver of blue was observed around the edges of the Moon, while in the Swarovski the same sliver was more yellow than blue. The greater magnification of the Swarovski was immediately apparent however, where it presented significantly more in the way of crater details than the lower power Savannah.

Before packing up, I enjoyed watching the fast moving clouds passing near and over the lunar image in both instruments, creating a wonderful dispaly of natural colour. It was good to get out and do some observing in a reasonably dark sky once again.

Now, I suppose you are wondering whether I would recommend the Swarovski to a prospective buyer, especially since I do not, in general, have a tendency to use or promote premium equipment. I’m going to say ” yes” with this one, for reasons I would like to outline here.

It boils down to how much you intend to use the instrument. For astronomical telescopes, most folk get to set up and use their gear maybe once or twice a week(if you’re especially keen)  for a few hours at the most, though I suspect that this is probably the exception rather than the rule. If you are a keen glasser however, you will likely use binoculars far more frequently and for long periods of time. The Swarovski is a beautifully made, precision instrument that will endure knocks, extremes of weather and much more besides. It comes with a very nice quality case and  carrying strap and the company stands behind many innovative accessories that will only add to your pleasurable experiences.  It will often be your only companion in the great outdoors. Without a doubt, a premium binocular like this will hardlly ever fail, so you are investing in a durable, high- quality instrument that will grow as your interests grow and diversify.

I can say all of this with absolute confidence. Why? Because within a couple of days of testing both instruments disaster struck with my Savannah.

If you recall, I bought the Savannah second hand from an ebay seller. It worked flawlessly even with continued use every day, for many months. I was intending to bring it along with me to southwest Wales for a family vacation, when the dioptre ring developed a fault. Although it still worked quite well, I found I had to turn it to the extreme end of its travel before getting a well focused binocular image! The failure upset me, but thank goodness, the story had a silver lining.

An Act of Generosity

I contacted Optical Vision Limited(OVL), the company that now owns Barr & Stroud, as well as other small players in the mid-priced binocular market. I explained the problem to them, at which point they asked if I could provide proof of purchase. I then explained to them that I actually bought it used and that I just assumed that the 10-year warranty was transferable to new owners. Unfortunately, OVL informed me that the warranty was not transferable. However, they were aware of my long-standing work for the astronomical community and kindly offered to honour the warranty. Well, the relief on my face was all too clear to everyone and I accepted their gracious offer. I dispatched the instrument by courier to their depot in Bury St. Edmunds, Suffolk, just prior to setting out on our 400 mile journey to Pembrokeshire.

While we were in Wales, OVL contacted me to say that they would be sending me a new binocular to replace the old one and asked if I would choose a day for the courier to deliver the instrument. I arranged to have it delivered the day after our return home.

Sure enough, the new Savannah 8 x 42 arrived in perfect nick. Excitedly, I opened the box to find the brand-new instrument carefully packed inside. I had my new Savannah and it worked perfectly!

After a year of considerable grief in my professional career, something good finally happened!

 

Contentment.

Thank you so very much OVL!

What the experience taught me

I once purchased a pair of perfectly serviceable 10 x 50 binoculars for $30 at an electronics retailer. These binoculars showed that if you choose carefully, you can get good optics for relatively little money. So what do you get if you spend ten times as much? In terms of the actual view, not as much as you might expect. Yes, more expensive binoculars have better optics that will deliver more light to your eyes and sharper images, but the difference is not night and day. What the extra money does buy you is mechanical quality. Expensive binocuars can withstand the inevitable bumps  and knocks of everyday use without trouble, and having focusing mechanisms that are sure and precise.

Gary Seronik, Editor of Sky News and former Sky & Telescope columnist and author of over 200 articles under Binocular Highlights.

This quote from Seronik’s book, Binocular Highlights (2nd edition) is very true. In my case the Savannah binocular (mid-priced in the scheme of things) gives you about 90 per cent of the optical performance of the Swarovski. Yes, the latter is definitely the better instrument, but it is the mechanical design and not the optics where it especially excels. That said, I have become very fond of the Savannah, as it feels right in my hands, and punches well above its weight. I don’t know how the fault with the dioptre ring developed but what I can say is that I will be keeping a very close eye on it. And if any issues arise with it again, you’ll be the first to know!

Second time lucky: fingers crossed!

I am very grateful to Ian for allowing me to test the 10 x 42 EL Range. I now know why he spent so much money to acquire one!

 

Neil English’s new book, The ShortTube 80: A User’s Guide (267 pages) is now published.

 

 

 

De Fideli.