Magnification 8x 10x 12x
Obj. lens diameter 42mm
42mm
42mm
Exit pupil 5.25mm 4.2mm 3.5mm
FOV
6.5°
Apparent FOV (FOV x Power)
52°
60°
60°
Field of view (ft/1000 yds) 341
314
262
Brightness 27.6
17.6
12.3
Light transmission (%) 90% 89% 89%
Twilight factor 18.3
20.5
22.4
Multi Position Eyecups Y/N Yes
Yes
Yes
Eye relief 19.5mm 16mm 15mm
Near focus 5.9ft
5.9ft
5.9ft
Eye width adjustment 58~72mm
58~72mm
58~72mm
Dimension WxHxD 5x5.7x2
5x5.7x3
5x5.7x4
Weight 24 oz 24.5 oz 24.5 oz
Lens constr. obj. 3 groups 4 elements (ED)
3 groups 4 elements (ED)
3 groups 4 elements (ED)
Lens constr. ocular 3 groups 4 elements 3 groups 4 elements 3 groups 5 elements
Prisms type Schmidt-Pechan
Schmidt-Pechan
Schmidt-Pechan
Prism reflective coating type Dielectric coating
Dielectric coating
Dielectric coating
ED glass Yes Yes Yes
Lens coating Scratch and Oil Resistant
Scratch and Oil Resistant
Scratch and Oil Resistant
Diopter correction (dpt) +/-3
+/-3
+/-4
Pressure tested to what pressure 1m for 5 min. (IPX6)
1m for 5 min. (IPX6)
1m for 5 min. (IPX6)
Storage temperature
-40°~158°F
-40°~158°F
-40°~158°F
Functional temperature
-13°~140°F
-13°~140°F
-13°~140°F
Frame material Polymer
Polymer
Polymer
Internal gas purged Nitrogen
Nitrogen
Nitrogen
Tripod Adaptable Y/N Yes Yes Yes
Origin Japanese and Chinese components assembled in the Philippines
Japanese and Chinese components assembled in the Philippines
Japanese and Chinese components assembled in the Philippines