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
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