My Thoughts on the Canon IS II 10 x 30 and the 12 x 36 IS III.

A Work Commenced November 29 2024

A few months back I bought in two of Canon’s Image stabilised binoculars: the 10 x 30 IS II and the 12 x 36 IS III for testing and evaluation. Having been suitably impressed with the smaller 8 x 20 model, I was keen to see how these larger units would perform. Of the two instruments tested, one emerged as a firm favourite- the 12 x36 IS III.

Both instruments have nice ergonomics. Focusing is precise and backlash free. These instruments focus by moving the objective lenses back and forth. The rubberised armouring affords excellent grip too. By storing these instruments in water-tight Tupperware containers with about 150g of silica gel desiccant, I was able to quickly render them fog proof. The interiors become bone dry after a few days of storage, allowing me to use them for extended periods in cold weather.

The 10 x 30 delivers crisp images from edge to edge. It is small and lightweight, and provides a good magnification boost at 10x in a 6 degree field. In a series of handheld tests against my 10 x 50 SRBC, the 10 x 30 IS II was easily shown to deliver finer details of critical targets at distance while the stabilisation button was engaged. Contrast is good as is resistance to glare. Examining the entrance pupils of both instruments shows well executed control of stray light as the photos below attest.


Both the 10 x 30 and 12x 36 exhibit modest chromatic aberration on high-contrast targets, with the 12 x 36 IS III exhibiting substantially more than the 10 x 30 unit. In contrast, the world-class optics on the 10 x 50 SRBC APO delivers virtually no colour fringing all the way across its enormous 7.5 degree ultra-flat field. 

I noted no significant differences in the degree of stabilisation on both instruments, even though the 10 x 30 has a more generous range of stability at +/-1.0 degrees( as opposed to +/-0.9 degrees for the larger 12 x 36.  I did note a slight defocusing of the image on both instruments as the stabilisation button began to be engaged, but a few moments later, they would settle down to give a nice, sharp image of various field targets. As well as seeing finer details than any handheld 10x binocular, I found I could tweak the focus post stabilisation ever so slightly to get the finest images these instruments can deliver.

I would recommend the 10 x 30 as a fine ultraportable platform for casual bird watching or nature studies. It’s also quite decent on the night sky but ultimately it proved to be inferior to the views garnered by the 12 x 36 ISIII. 

I’ve been experimenting with various types of battery with these instruments. I found alkaline batteries to be troublesome to use on extended walks in cold weather when they would quickly discharge. I then switched to rechargeable lithium ion batteries. Despite warnings that they may overheat, I found them perfectly suitable for my purposes, delivering better cold weather performance in sub zero conditions, as well as longer lasting power delivery. I can also leave them inside the instruments while not in use without the worry of leakage and corrosion of the electrodes.  

The 12 x 36IS III is an excellent, all-purpose instrument, delivering good daytime views. Weighing only a little more than the 10 x 30, it can be carried easily over miles of countryside. The extra magnification comes in real handy for identifying smaller birds at distance, though it struggles a little under dull winter light with its small(3mm) exit pupils. 

What I absolutely love about the 12×36 ISIII is its astronomical performance. With the shorter days of autumn and winter, I’ve started night walks around Culcreuch Castle Estate, when I take along the 12 x 36 IS III to combine my love of stargazing with my enthusiasm for walking. In this capacity, the instrument gets regular use after dark. I have thoroughly enjoyed views of the showpiece glories of the night sky: with my eyes fully dark-adapted and away from village lights, I have soaked up magnificent views of the Pleiades, Hyades, the Double Cluster, the Alpha Persei Cluster, the Coathanger asterism and Kemble’s Cascade to name but a few. The 36mm objectives provide far more compelling views of fainter star clusters such as M36, M37 and M38 in Auriga than the smaller 10 x 30. M35 in Gemini and M34 in Perseus are well resolved. Collinder 70 is very impressively rendered, as is the Sword Handle of Orion. And while my 10 x 50 SRBC produces brighter images with more stellar sparkle, the smaller exit pupils of the 12 x 36IS III, serves up a darker hinterland, often producing more aesthetically pleasing views. Indeed the stabilised 12 x 36 shows me just as much as the larger 10 x 50 handheld.  

Views of the Moon are excellent in the 12 x 36, with its 12 x delivering stunning views of maria and crater fields. Though some chromatic aberration is present, I don’t find it distracting. Jupiter shows a nice, clean, yellow-white disk. The Galilean satellites are well resolved once adequately placed away from the glare of the planet.


I’ve visited many binocular doubles with the 12 x 36 IS III. For example, Albireo is very nicely resolved handheld, the green and golden components showing up nicely. And just southeast of Vega, I was able to cleanly resolve Zeta Lyrae, the components of which are separated by 44 arc seconds with one component over a full magnitude brighter than the other. This is a challenge for a non-stabilised binocular but rendered easy using the stabilisation button on the 12 x 36 ISIII. 
One final thing to mention: The Porro II optical design of these Canon IS binoculars render stars as very tightly focused and pinpointed, in contrast to what many roof prism binoculars serve up.

All in all, I’m thrilled to bits with the 12 x36 ISIII binocular. Any quibbles? Maybe just one: it’s less than stellar close focusing compared with many roof prism instruments I’ve enjoyed. It’s a small drawback for birding but not a deal breaker.

Read many more reviews of binoculars of all sizes in my book, Choosing and Using Binoculars: a Guide for Stargazers, Birders and Outdoor Enthusiasts.

De Fideli.

Product Review: Canon IS 8 x 20.

 

The Canon IS 8 x 20 package.

A Worked Commenced January 21 2022

 

 

 

Product: Canon IS 8 x 20

Country of Manufacture: Taiwan

Field of View: 115m@1000m (6.6 angular degrees)

Exit Pupil: 2.5mm

Eye Relief: 13.5mm

Coatings: Fully Broadband Multi-Coated, Super Spectra Coating

Dioptre Compensation: +/- 5.9 

Water Proof: No

Nitrogen Purged: No

ED Glass: No

Close Focus: 2m advertised( 2.02 m measured)

Dimensions: W/H 11.8/14.2cm

Weight: 420g(without battery)

Supplied Accessories: Soft carry case, padded neck strap, instruction manual, 1x CR123A lithium battery, eyepiece covers, warranty card.

Price(UK): £425.70

 

 

In a recent blog, I outlined my experiences of an older model Canon IS 10 x 30. I was impressed by the image stabilisation technology on that unit and described its optical quality as very good but not outstanding. These tests got me curious about two smaller models recently introduced by the giant Japanese camera manufacturer; a 8 x 20 IS and 10 x 20 IS, which promised even better ergonomics than the older generation 8 x 25 IS and 10 x 30 IS models. So I decided to buy and test the smaller 8 x 20 IS, the subject of this new review.

First Impressions

The Canon 8 x 20 IS arrived neatly boxed away inside its soft carry case, together with a comprehensive user manual, lithium ion battery, and warranty card. Weighing in at 420g without the battery, the binocular has a tough, grey coloured plastic chassis which I immediately found much easier to handle than the larger 10 x 30 IS, which tips the scales at 660g in comparison.

Like the older generation models, the new Canon 8 x 20 IS has soft rubber eye cups that can be folded down for use with spectacles. Turning next to the objectives, I was quite surprised but very happy to see that the 20mm objectives on the Canon were very deeply recessed; far more deeply in fact than any other binocular I’ve thus far encountered. Doubtless, this helps quite a lot in keeping stray light, dust and rain at bay; a good thing surely, as these units are not waterproof.

The small, 20mm objectives on the Canon IS 8 x 20 are very deeply recessed to protect them from the elements and stray light.

The focus wheel on the Canon IS 8 x 20 appears to be made of metal. It has very good grip and is large enough to access and manoeuvre even while wearing thick winter gloves. The dioptre compensation is achieved in the traditional way, by rotating the base of the right eye cup until you achieve your desired setting.

The single CR123A lithium ion battery is easily installed in a pull-out compartment located under the focus wheel. The image stabilisation is achieved by pressing a small button offset onto the right barrel of the binocular, causing a small green LED to light up while it is being activated. The instruction manual states that the battery has a lifetime of about 12 hours at room temperature but is reduced to just 8 hours at -10C. During my tests I never encountered any problems using the image stabilisation function, which involved a few hours of testing at temperatures ranging from +20C to -2C.

The objective lenses on both the ocular and objectives have very nice and evenly applied anti-reflection coatings. The objective coatings have a pale, greenish tint while those on the eyepieces appeared magenta in daylight.

Note the magenta coloured anti-reflection coatings on the ocular lenses. One can also see the rectangular shaped battery compartment on the instrument immediately under the focus wheel.

Ergonomics

In comparison with my experiences with the older generation Canon IS 10 x 30, the smaller 8 x 20 model was much easier to use in my medium sized hands. For example, it was considerably easier to hold it with two hands, and accessing the off centre stabilisation button did not present any problems.

The large, centrally placed focus wheel turns very smoothly, with excellent inertia and with no play while rotating clockwise or anti-clockwise.

The textured, metal focus wheel on the Canon IS 8 x 20 rotates smoothly with no backlash, stiction or free play.

The rather old-school, flexi-rubber eyecups proved reasonably comfortable when they were pressed against my eyes. When I folded them down to test the eye relief for spectacle wearers however, I found it difficult to image the entire field of view using my varifocals. I think this an area that Canon can improve on in the future.

The old school soft rubber eyecups fold down for use with eye glasses.

Playing around with the Canon IS 8 x 20  in my hands, and comparing it to a conventional 8 x 20 pocket binocular, I felt the latter was much easier to achieve a stable, comfortable grip with. So, while the newer 8 x 20 IS units are a big improvement  over say a larger 10 x 30 IS, they are still nowhere near the comfort levels I experience using a conventional, dual-hinge 8 x 20 glass.

The Leica Ultravid BR 8 x 20 (left) is much easier to handle than the Canon IS 8 x 20(right).

Optical Assessment

I was quite impressed with the optical quality of the older generation Canon IS 10 x 30 but my tests on the newer IS 8 x 20 showed it to be a good deal better again. Conducting a bright light torch test showed no annoying  internal reflections, diffraction spikes or diffused light. Indeed, it was a good step up from the results I achieved with the older, Canon IS 10 x 30 in this regard. No doubt, this is largely attributed to the improved ‘Super Spectra’ coatings applied to its optical elements.

Looking through the Canon IS 8 x 20 during dull, overcast winter weather, I was  immediately impressed with the excellent sharpness, contrast and brightness of the image from edge to centre. Like the older models, these smaller Canon IS binoculars have built-in field flattening lenses which reduces field curvature and other off axis aberrations when viewing a target away from the centre of the field.

Indeed, in low light tests I conducted alongside my excellent Leica 8 x 20 BR Ultravid, I judged the Canon IS 8x 20 be equally bright, but just falling short of the sharpness of the Leica. Glare suppression however, was noticeably better in the Canon though. This is probably attributed to the very deeply recessed objective lenses on the Canon IS binocular in contrast to the Leica, the objectives of which are not at all recessed( maximising its compactness) and so are at the mercy of intrusions of stray light.

One aspect of the view was less engaging with the Canon IS 8 x 20 over the hand-held Leica Ultravid 8 x 20 though. Despite having a slightly larger field of view(6.6 vs 6.5 angular degrees), I felt the field was significantly more immersive in the Leica compared with the Canon 8 x 20. It almost felt as if I were watching a scene on a movie screen in the latter compared with the feeling of being much more ‘in the image’ using the Leica.

Chromatic aberration was an absolute non-issue in the Canon IS 8 x 20, unlike the larger and older Canon IS 10 x 30. Indeed, it was fully the equal of the Leica Ultravid 8x 20, with only the extreme edges of the field showing up the merest traces of secondary spectrum whilst glassing high contrast daylight targets.

Close focus was found to be very good in the Canon IS 8x 20 too. I measured it at just over 2 metres, in accordance with the stated numbers issued by Canon. Still, the Leica Ultravid 8 x 20 BR was noticeably better at 1.8 metres.

Depth of focus proved excellent in the Canon IS 8 x 20. Indeed, it was even a shade better than my Leica 8 x 20 Ultravid BR. This was largely to be expected, as the Porro prism design of the Canon has long been known to create better depth perception in comparison to their roof prism counterparts.

All in all, I judged the Canon IS 8 x 20 to have excellent optics, as good or better in many respects to the best roof prism instruments models available today.

Engaging the IS Technology

The real magic of these binoculars takes place when you press the image stabilisation button. Like the larger 10 x 30 IS I tested some weeks back, the smaller Canon 8 x 20 IS works brilliantly. Aim at your target, focus as sharply as you can and press the IS button. You can immediately see finer detail that is quite invisible in the non-stabilised views. The stabilisation function works in two modes: sporadic and continuous. Most of the time, I used the button to stabilise the image for a few seconds before dis-engaging. But the IS function can also be used continuously for up to five minutes. I got on less well with the latter mode, as I felt a bit queasy moving the binocular from one target to the other, and watching the images ‘swim’ into  stabilised mode.

In another test, I compared the stabilised views on the Canon 8 x 20 IS to a tripod- mounted Leica Utravid 8 x 20. Carefully going back and forth between the instruments, I discerned slightly more details in the tripod-stabilised Leica than the Canon 8 x 20 IS. This is in keeping with my results with the older generation 10 x 30 IS. The tripod-stabilised view offers a little more in the way of resolution at the cost of losing portability.

In yet another test, I aimed the Canon IS 8 x 20 on the Pleaides star cluster high in the winter sky, comparing the non-stabilised view with the images served up when the IS function was engaged. The results were quite dramatic; many fainter stars popped into view when the IS button was engaged. Very impressive!

Concluding Thoughts and Recommendations

The Canon 8 x 20 IS serves up very impressive views, even when the image stabilisation function is dis-engaged. These newer models have noticeably improved optics over their older counterparts, especially in terms of brightness and contrast, and in the control of stray light. Indeed, optically, they are very close to the quality served up by the world’s best pocket binoculars. Having said that, while I fully acknowledge that the smaller weight of these new Canon IS binoculars is a big step in the right direction in terms of ergonomic handling, they still fall quite a bit short in terms of how good they feel in my hands compared with my little Leica Ultravid. Indeed, I think the engineers at Canon could make some significant improvements in the shape of the chassis to allow a better grip in the hand. What’s more, their lack of waterproofing will put others off, especially if they intend using them for long periods in the field where the weather can change without warning.

So, all in all, a terrific product, but still some room for improvement.

 

Thanks for reading.

 

 

De Fideli.