Magnification 7x 9x 11x
Obj. lens diameter 45mm
45mm
45mm
Exit pupil 6.4mm 5mm 4.1mm
FOV
7.4°
7.2°
Apparent FOV (FOV x Power)
51.8°
64.8°
66°
Field of view (ft/1000 yds) 388 377 314
Brightness 51 25 16.7
Light transmission (%) 93.70% 93.70% 94.80%
Twilight factor 17.7 20.1 22.2
Multi Position Eyecups Y/N Yes
Yes
Yes
Eye relief 18mm 17.3mm 16.7mm
Near focus 6.5ft 4.9ft 4.9ft
Eye width adjustment 56~75mm
56~75mm
56~75mm
Dimension WxHxD 5.7x7.1x2.2
5.7x7.1x2.3
5.7x7.1x2.4
Weight 33.25 oz 33.25 oz 33.25 oz
Lens constr. obj. 3 groups 4 elements (ED)
3 groups 4 elements (ED)
3 groups 4 elements (ED)
Lens constr. ocular 4 groups 4 elements 5 groups 6 elements 4 groups 6 elements
Prisms type Abbe-Koenig
Abbe-Koenig
Abbe-Koenig
Prism reflective coating type N/A
N/A
N/A
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 Magnesium
Magnesium
Magnesium
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