Magnification 6x 8x 10x
Obj. lens diameter 30mm
30mm
30mm
Exit pupil 5mm 3.75mm 3mm
FOV
8.5°
8.2°
6.5°
Apparent FOV (FOV x Power)
51°
65.5°
65°
Field of view (ft/1000 yds) 446
430
341
Brightness 25
14.1
9
Light transmission (%) 94.60% 95.20% 94.60%
Twilight factor 13.4
15.5
17.3
Multi Position Eyecups Y/N Yes
Yes
Yes
Eye relief 18.3mm 15.1mm 15.3mm
Near focus 8.2ft 8.2ft 8.2ft
Eye width adjustment 56~73mm
56~73mm
56~73mm
Dimension WxHxD 4.7x4.6x1.7
4.7x4.6x1.8
4.7x4.6x1.9
Weight 16.25 oz 16.25 oz 16.5 oz
Lens constr. obj. 3 groups 4 elements (ED)
3 groups 4 elements (ED)
3 groups 4 elements (ED)
Lens constr. ocular 4 groups 5 elements 4 groups 5 elements 4 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) +/-2
+/-4
+/-4
Pressure tested to what pressure 1m for 30 min. (IPX7)
1m for 30 min. (IPX7)
1m for 30 min. (IPX7)
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 components assembled in the US
Japanese components assembled in the US
Japanese components assembled in the US