Maven B.2 9x45 specs and field of view
The Maven B.2 9x45 has a 377 ft field and 4.9 ft close focus with 9x power, and its exit pupil works out to 5 mm.
- Field of view
- 377 ftat 1,000 yd
- Eye relief
- 17.3 mm
- Close focus
- 4.9 ft
- Weight
- 33.3 oz
- Exit pupil
- 5 mmcalculated
Why pick it
- 17.3 mm eye relief, enough for glasses
- Focuses as close as 4.9 ft
- Waterproof
Who the B.2 9x45 suits
Suits dusk looks and near subjects, since the close focus is 4.9 ft. A relief of 17.3 mm leaves room behind the lens.
At 33.3 oz it is heavy, and the maker prints no named uses.
B.2 9x45 aside, the most popular models of all sizes are in our best binoculars comparison. Maven lists it in the $1,000 to $2,000 price band, alongside the models in best binoculars over $1,000.
B.2 9x45 specifications
B.2 9x45 figures as Maven prints them; rows marked * are calculated from the 9x45 size.
| Magnification | 9x |
|---|---|
| Objective lens | 45 mm |
| Prism type | Roof |
| Field of view | 377 ft at 1,000 yd (126 m at 1,000 m) |
| Angular field of view | 7.2° |
| Apparent field of view | 64.8° |
| Eye relief | 17.3 mm |
| Close focus | 4.9 ft (1.5 m) |
| Eye spacing range | 56 to 75 mm |
| Weight | 33.3 oz (943 g) |
| Length | 7.1 in (180 mm) |
| Width | 5.7 in (145 mm) |
| Extra-low dispersion glass | Yes |
| Waterproofing | 1m for 30 min. (IPX7) |
| Fog-proofing gas | Nitrogen |
| Tripod adaptable | Yes |
| Maker list price | $1,000 to $2,000 |
| Exit pupil | 5 mm * |
| Twilight factor | 20.1 * |
| Relative brightness | 25 * |
* Calculated from the size, not printed by the maker.
Other sizes of the B.2
Maven makes the B.2 in 2 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 |
|---|---|---|---|---|---|---|
| Maven B.2 9x45 | 9x45 | 377 ft | 17.3 mm | 4.9 ft | 33.3 oz | 5 mm |
| Maven B.2 11x45 | 11x45 | 314 ft | 16.7 mm | 4.9 ft | 33.3 oz | 4.1 mm |
Maven binoculars
B.2 9x45 questions
B.2 9x45: does it work with glasses?
B.2 9x45 has 17.3 mm of eye relief, which meets the 16 mm the RSPB advises for people who wear glasses.
B.2 9x45: what does 9x45 mean?
B.2 9x45 magnifies 9 times through 45 mm front lenses, which works out to an exit pupil of 5 mm, the width of the beam of light that reaches each eye.
B.2 9x45: can it go on a tripod?
B.2 9x45 is tripod adaptable according to Maven, so it accepts a binocular tripod adapter.