A Work Commenced July 19 2026
Use Product Code Ne30 to get $30 off your purchase.
Product: SvBony SA401 PRO 15-35 x 56 mm Flat field APO Spotting Scope
Place of Manufacture: China
Clear Aperture: 56mm
Chassis Substrate: Magnesium alloy
Objective Type: Triplet APO
ED Glass: Yes
Eyepiece Design: 11-element, 7-group optical layout with an integrated field flattener
Field of View: 4.0- 2.1 angular degrees
Eye Relief: 17-16mm
Eyepiece Diameter: 28mm
Eyecup Design: Twist up, Multi Stage
Armouring: Army Green Rubber
Prism Type: High light transmission K9 Roof
Light Transmission: 92 per cent
Coatings: Fully Multicoated
Retractable Dew Shield: No
Focuser Type: Oversized Single Speed Helical
Rotatable Tube: No
Waterproof: Yes (IPX7)
Nitrogen Purged: Yes
Close Focus: 7m advertised, 3.06m measured
Weight: 1200g advertised, 1069g measured
Warranty: 2 Years
Retail Price(UK): £399.99
Without a shadow of a doubt SvBony Sports Optics has taken the world by storm by offering very high quality optics – binoculars and spotting scopes – that are now competing favourably with the best that European manufacturers are producing. You don’t have to take my word for it either: check out the preamble video above comparing SvBony’s earlier model SA401 APO to its Swarovski equivalent – where the presenter provides ample video evidence showing how the SvBony scope compares favourably with the latter despite being several times less expensive.
Over the last few years, I’ve noticed a distinct trend in spotting scope marketing. There appears to be a much greater demand for smaller, lighter weight optical devices that still deliver premium optical quality. For example, the recent launch of the Zeiss Conquest Apia 20-50 x 65mm, for example, delivers a relatively lightweight 1350g spotting scope featuring a maximum field of view of 2.7 degrees at 20x, closing to 1.42 degrees at 50x.
Not to be outdone, SvBony has now launched their new flagship mini spotter- the SA401Pro 15-35x 56mm – offering top notch optical performance that significantly exceeds the Zeiss in a number of ways consumers will immediately appreciate- and all for a fraction of what the Zeiss Conquest Apia retails for!
Pint-Sized Powerhouse
Let’s take a look around this new little optical wonder. Tipping the scales at just 1069g, it’s incredibly light. Size wise, it measures just 11 inches from end to end.
The scope attaches to most any mount using a built in shoe located at the base of the scope.
Operation of the SA401 PRO 15-35x 56 is child’s play thanks to the oversized helical focuser on both the barrel and the zoom function immediately under the eyepiece. No faffing about with dual speed focus wheels and the like which are more a hindrance than a help.
Eye relief is very comfortable throughout its 2.3x zoom range. I can access the entire field of view at all magnifications from 15x through 35x using my ordinary(non-progressive) eye glasses. For those who don’t wear eyeglasses, the rubber twist-up eyecups do a great job.
I was surprised to see that the SA401PRO doesn’t come with a retractable dew shield; an odd choice, that’s for sure. That said, it’s easily remedied by making a lens shade out of blackened cardboard if needs be.
Optical Evaluation
My first optical test was to direct the SA401PRO at a bright light to see how it handled stray light and internal reflections. I’m delighted to report that the scope performed great: very little in the way of internal reflections and a barely discernible diffraction spike. This instrument will do very well observing brightly illuminated sources at any time of the day!
The view through the SA401 PRO is excellent: razor sharp, bright and high in contrast. Sharpness extends almost all the way to the very edge. Pincushion distortion is also well controlled. Colour correction is excellent too. The size of the field at 15x – a whopping 4 degrees- is the amazing stand out feature- far wider than any of its competitors at both the low and high power end of the scale, where the field shrinks to 2.1 degrees! Simply put, this puts far more real estate in front of your eyes- a significant advantage when scanning for or tracking an object.
What really surprised me was how close the SA401 PRO can focus- a mere 3.06m – well shorter than the advertised 7m!
That allows you to get photos( limited to low res 200K images by this website) like this flower bed I took handholding my IPhone up to the eyepiece with the target only a few metres away:
In order to assess the colour correction of the SA401PRO 15-35×56, I tested it along side one of my grab ‘n’ go scopes – a Skywatcher Evostar ED80 apochromatic refractor – featuring a 80mm F/7.5 ED doublet objective with one element composed of FPL53 extra low dispersion glass, which has optical properties virtually indistinguishable from Fluorite crystal.
In order to make the test fairer, I stopped down the APO from 80mm to 50mm simply by removing the cap from the objective cover.
Stopped down to 50mm creates a very slow f/12 instrument, and as you’d expect, improves its colour correction still further; sensibly perfect in fact! Comparing the views through this makeshift 50mm f/12 APO and the SA401 PRO I was surprised how comparable the images were in the two instruments. At 35x, the SA401 PRO served up an image with a tad less contrast and a bit more lateral colour near the edge of the field. Clearly the two FCD1 elements mated to the Lanthanum element making up the triplet objective design were doing a very good job. In a further test for colour correction, I turned the SA401 PRO on the bright summer star, Vega, and cranked up the power to 35x. I detected no secondary spectrum around the star as I moved it from the centre to the very near the edge of the field, where I did pick up some lateral colour. Incidentally this was an also an opportunity to test the flatness of the field. Here the SA401 PRO produced excellent results: the star remaining tightly focused about 90 per cent of the way to the field stop, after which I detected minor amounts of coma and astigmatism. All in all, the SA401 PRO exhibits excellent colour correction at least on par with SvBony’s larger SA401 APO scope I’ve previously reviewed, but with a noticeably flatter and wider field.
Some Sample Images
The SA401 PRO mini spotter is easy to use with your smartphone and I obtained all the images for this review simply by holding my phone camera up to the eyepiece. It also works well with SvBony’s inexpensive SC002 imager.
Here is one image showing the edge to edge sharpness of the yellow flowers in the foreground located some 35m in the distance:
Her’s another image showing a section of a fallen tree at about 100m distance.
On a fine July evening I took a half-mile walk up to my local pond to see if there was any activity out on the water.
After a long day resting in the summer heat, the birds become more active in the cool of the evening. I took a few shots of some of the birds enjoying a cool dip out on the water.
Using the SC002 Imager
SvBony markets a neat little imaging device called the SC002. Incredibly versatile, it attaches to any spotting scope and can be clamped into place by twisting the upper section
The SC002 imager connects easily to any smartphone and can be used to take images or video footage. I used it to take some photos of some Rooks enjoying some late evening sunshine in nearby trees.
Conclusions & Recommendations
The little SA401 PRO 15-35x 56mm expertly fuses portability with very high optical performance, in a tough weather resistant frame. With a class-leading flat and ultra-wide field, it will prove to be an exceptionally versatile visual and photographic tool to capture breathtaking views of the natural world. It’s an absolute bargain in today’s market! I hope to bring it on vacation with me later this year to observe sea life down at the coast.
Highly recommended!
Read more on a wide range of sports optics in my book, Choosing And Using