Kowa Genesis Prominar 8.5x44 specs and field of view
Eye relief of 18.5 mm and a calculated 5.2 mm exit pupil sit together in the Genesis Prominar 8.5x44, which shows 368 ft at 1,000 yd.
- Field of view
- 368 ftat 1,000 yd
- Eye relief
- 18.5 mm
- Close focus
- 5.6 ft
- Weight
- 33.2 oz
- Exit pupil
- 5.2 mmcalculated
Why pick it
- 18.5 mm eye relief, enough for glasses
- Focuses as close as 5.6 ft
- Waterproof
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Who the Genesis Prominar 8.5x44 suits
The 18.5 mm eye relief suits eyeglass wearers, and a calculated 5.2 mm exit pupil suits dusk and dawn viewing. The 368 ft view helps when following moving birds.
At 33.2 oz it is heavy for its size, close focus is 5.6 ft, and the maker list price band is $1,000 to $2,000.
Genesis Prominar 8.5x44 or another model: the best binoculars by maker figures shows how the popular ones differ. Kowa lists it in the $1,000 to $2,000 price band, alongside the models in best binoculars over $1,000.
Genesis Prominar 8.5x44 specifications
Genesis Prominar 8.5x44 figures as Kowa prints them; rows marked * are calculated from the 8.5x44 size.
| Magnification | 8.5x |
|---|---|
| Objective lens | 44 mm |
| Field of view | 368 ft at 1,000 yd (122 m at 1,000 m) |
| Angular field of view | 7° |
| Apparent field of view | 60° * |
| Eye relief | 18.5 mm |
| Close focus | 5.6 ft (1.7 m) |
| Weight | 33.2 oz (940 g) |
| Length | 2.5 in (165 mm) |
| Width | 5.4 in (138 mm) |
| Extra-low dispersion glass | Yes |
| Waterproofing | Waterproof, nitrogen filled |
| Fog-proofing gas | Nitrogen |
| Maker list price | $1,000 to $2,000 |
| Exit pupil | 5.2 mm * |
| Twilight factor | 19.3 * |
| Relative brightness | 26.8 * |
* Calculated from the size, not printed by the maker.
Other sizes of the Genesis
Kowa makes the Genesis in 6 sizes; a larger front lens adds brightness and weight, and more magnification narrows the view.
| Model | Size | Field of view | Eye relief | Close focus | Weight | Exit pupil | Amazon |
|---|---|---|---|---|---|---|---|
| Kowa Genesis Prominar 8.5x44 | 8.5x44 | 368 ft | 18.5 mm | 5.6 ft | 33.2 oz | 5.2 mm | Check price on Amazon |
| Kowa Genesis Prominar XD22 8x22 | 8x22 | 429 ft | 18.5 mm | 4.9 ft | 11.1 oz | 2.8 mm | Check price on Amazon |
| Kowa Genesis Prominar XD22 10x22 | 10x22 | 344 ft | 16 mm | 4.9 ft | 11.5 oz | 2.2 mm | Check price on Amazon |
| Kowa Genesis Prominar 8x33 | 8x33 | 420 ft | 15 mm | 4.9 ft | 20.8 oz | 4.1 mm | |
| Kowa Genesis Prominar 10x33 | 10x33 | 357 ft | 15 mm | 4.9 ft | 20.8 oz | 3.3 mm | Check price on Amazon |
| Kowa Genesis Prominar 10.5x44 | 10.5x44 | 326 ft | 16 mm | 5.6 ft | 33.2 oz | 4.2 mm |
Kowa binoculars
Genesis Prominar 8.5x44 questions
Genesis Prominar 8.5x44: does it work with glasses?
Genesis Prominar 8.5x44 has 18.5 mm of eye relief, which meets the 16 mm the RSPB advises for people who wear glasses.
Genesis Prominar 8.5x44: what does 8.5x44 mean?
Genesis Prominar 8.5x44 magnifies 8.5 times through 44 mm front lenses, which works out to an exit pupil of 5.2 mm, the width of the beam of light that reaches each eye.