Magnification 8x 10x
Obj. lens diameter 42mm
42mm
Exit pupil 5.25mm 4.2mm
Field of View (FOV)
8.0°
6.6°
Apparent FOV (FOV x Power)
64°
66°
Field of view (ft/1000 yds) 420 347
Brightness 27.6 17.6
Light transmission (%) 93.95% 94.50%
Twilight factor 18.3 20.5
Multi Position Eyecups Y/N Yes
Yes
Eye relief 18.1mm 17.8mm
Near focus 4.9ft 4.9ft
Eye width adjustment 56~74mm

56~74mm

Dimension WxHxD 5.2x5.7x2.2
5.2x5.7x2.2
Weight 26.808 oz 26.808 oz
Lens constr. obj. 3 groups 4 elements (ED)
3 groups 4 elements (ED)
Lens constr. ocular 4 groups 5 elements 4 groups 6 elements
Prisms type Wide Angle
Schmidt-Pechan
Wide Angle
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) +/-3
+/-5
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 Yes Yes
Origin Japanese components assembled in the US
Japanese components assembled in the US