Specifications – Nikon PROSTAFF User Manual
Page 6
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Specifications
* The number calculated by the formula [tan ω' = Γ x tan ω ]: Apparent field of view: 2ω', Magnification: Γ, Real
field of view: 2ω
** Without diopter adjustment
Model
8x42
10x42
Magnification ( x )
8
10
Effective diameter of objective lens (mm)
42
42
Angular field of view (real) (°)
6.3
6.0
*Angular field of view (apparent) (°)
47.5
55.3
Field of view at 1,000m/yds. (m/ft.)
110/330
105/314
Exit pupil (mm)
5.3
4.2
Brightness
28.1
17.6
Eye relief (mm)
19.3
15.4
**Close focusing distance, approx. (m/ft.)
4.0/13.1
4.0/13.1
Interpupillary distance adjustment (mm)
56-72
56-72
Length (mm/in.)
175/6.9
172/6.8
Width (mm/in.)
129/5.1
129/5.1
Weight (g/oz.)
665/23.5
665/23.5
Type
Roof prism central focusing
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