Nikon 7x50 WX IF Binocular (Black) - Manual (Page 27)

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Specifications
Type: Dach prism individual focusing type
Model
7Ч50 10Ч50
Magnification (×) 7 10
Effective diameter of objective
lens (mm)
50 50
Angular field of view (real) (˚) 10.7 9
Angular field of view (apparent) (˚)* 66.6 76.4
Field of view at 1,000 m/yd. (m/ft.) 188/563 157/472
Exit pupil (mm) 7.1 5.0
Brightness 50.4 25.0
Eye relief (mm) 17.7 15.3
Close focusing distance (m/ft.) 12.3/40.4 20.0/65.6
Length (mm/in.) 272/10.7 291/11.5
Width (mm/in.) 171/6.7 171/6.7
Depth (mm/in.) 80/3.1 80/3.1
Weight (g/oz.) 2420/85.4 2505/88.4
Interpupillary distance
adjustment (mm/in.)
58-78
2.3-3.1
58.5-78
2.3-3.1
Structure Waterproof (up to 5 metre for 10 minutes) and nitrogen gas filled
* The number calculated by the formula [tan ω' = Γ x tanω ]: Apparent field of view: 2ω', Magnification: Γ ,
Real field of view: 2ω