B.7 Specifications
Magnification | 8x | 10x |
Obj. lens diameter | 25mm | 25mm |
Exit pupil | 3.1mm | 2.5mm |
Field of View (FOV) | 6.8° | 6.0° |
Apparent FOV (FOV x Power) | 54.4° | 60° |
Field of view (ft/1000 yds) | 356 | 314 |
Brightness | 9.6 | 6.25 |
Light transmission (%) | 93.00% | 92.00% |
Twilight factor | 14.1 | 15.8 |
Multi Position Eyecups Y/N | Yes | Yes |
Eye relief | 15.0mm | 15.0mm |
Near focus | 9.8ft | 9.8ft |
Eye width adjustment | 38~73mm |
38~73mm |
Dimension WxHxD | 4.58x4.76x1.6 | 4.58x4.76x1.6 |
Weight | 12.4 oz | 12.4 oz |
Lens constr. obj. | 2 groups 3 elements (ED) | 2 groups 3 elements (ED) |
Lens constr. ocular | 3 groups 4 elements | 4 groups 6 elements |
Prisms type | Schmidt-Pechan | Schmidt-Pechan |
Prism reflective coating type | Dielectric Coating | Dielectric Coating |
Phase Correction Coating | Yes | Yes |
ED glass | Yes | Yes |
Lens coating | Scratch and Oil Resistant | Scratch and Oil Resistant |
Diopter correction (dpt) | +/-4 | +/-4 |
Pressure tested to what pressure | 1m for 30 min. (IPX7) | 1m for 30 min. (IPX7) |
Storage temperature | -40°~158°F | -40°~158°F |
Functional temperature | -13°~140°F | -13°~140°F |
Frame material | Magnesium | Magnesium |
Internal gas purged | Nitrogen | Nitrogen |
Tripod Adaptable Y/N | No | No |
Origin | Japanese components assembled in the US | Japanese components assembled in the US |