Two eyes, a wide field, and no setup at all · review
A 10x50 with BAK4 prisms, fully multi-coated objectives and individual dioptre adjustment, sold as an all-rounder for nature, hunting and astronomy.
The bottom line A sensibly specified 10x50 for the sky, with the one figure that would let you compare it left as an adjective.
Ten times on fifty millimetres. The exit pupil works out at five millimetres, which is close to what a dark-adapted adult eye opens to — so almost all the light the objectives collect actually enters the eye. That is the reason 10x50 has been the default astronomy binocular for decades.
BAK4 prisms, which deliver a round exit pupil rather than one with squared-off edges. Fully multi-coated objectives, the strongest of the four coating labels. Continuous per-eye dioptre adjustment. Two-metre close focus. All four are claims that mean something.
Field of view, called large. Weight, absent. Waterproofing, unmentioned. The first of those is the figure that would place these against any other 10x50 on the shelf.
Sitting down. A reclining chair turns a 10x50 from something that makes your arms ache into an instrument you can sweep with for an hour, and it reveals stars that hand-holding hides behind the tremor.
German, French, Italian and Spanish Amazon stores ran from 74 € to 80 € on the day of the survey.
British Amazon catalogue holds a record for it that nobody is selling.
American Amazon store gave no result whatever, so the buy button there opens a search rather than an empty page.
Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.
Prices quoted in this text were read on 17 September 2026. The live price is at the top of the page.
| Aperture | 50 mm |
|---|---|
| Magnification | 10x, fixed by the design |
| Exit pupil | 5 mm — 50 divided by 10 |
| True field of view | Described as large; no figure is published |
| Prism type and coatings | BAK4, per the maker · Fully multi-coated objective, as the maker states it |
| Eye relief | Not published by the maker. |
| Close focus | 2 m, as the maker states it |
| Weight | Not published by the maker. |
| Tripod mounting | Not published by the maker. |
| Supplied accessories | Not published by the maker. |
| Amazon reference | B0FP6MB8N7 (same reference on 5 Amazon marketplaces) |
| EAN | 4260764710775 |
Most binoculars have one dioptre ring on the right eyepiece. Adjusting each eye separately suits people whose eyes differ more than that ring allows, and it also means the setting has to be re-made if someone else borrows them.
Field of view decides how much sky fits and how easy sweeping is. “Large” is a word; 94 m at 1000 m is a number. Only the second can be compared with another binocular.
10x magnification · 50 mm objectives · 360 g
A waterproof 10x50 with BAK4 prisms, fully multi-coated optics and 25 mm eyecups, published at 360 g.
Best for: Long hand-held sessions where weight is the deciding factor
≈ €50
10x · 50 mm · 758 g · waterproof and gas-filled
A waterproof, gas-filled 10x50 with BaK-4 glass, UR coating, twist-up eyecups and a metal centre focuser, published with its weight and dimensions.
Best for: Dusk and astronomy use in weather that would worry an unsealed pair
≈ $166 / £145 / €136
10x · 50 mm · 94 m field at 1000 m · 740 g
A 10x50 with BaK-4 prisms carrying an additional silver mirror coating, published with its field of view, weight, dimensions and close focus.
Best for: The observer who wants to compare figures before buying rather than adjectives
≈ $238 / £181 / €175
