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