| Magnification |
7x |
9x |
11x |
| Obj. lens diameter |
45mm |
45mm
|
45mm
|
| Exit pupil |
6.4mm |
5mm |
4.1mm |
|
Field of View (FOV)
|
7.4°
|
7.2°
|
6°
|
| 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 |
5.7x7.1x2.1 |
5.7x7.1x2.1
|
5.7x7.1x2.1
|
| 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
|
