Nikon 20x120 IV Telescopic Binoculars with Fork Mount - Manual (Page 14)

14
Jp
En
Specifications
Body
Model 20×120 IV 25×120
Magnification (×) 20 25
Objective diameter (mm) 120 120
Angular field of view (real) (˚) 3.0 2.9
Angular field of view (apparent) (˚) *1 55.3 64.7
Field of view at 1,000 m/yd. (m/ft) 52/156 50/150
Exit pupil (mm) 6.0 4.8
Relative brightness 36.0 23.0
Eye relief (mm) 20.8 18.9
Close focusing distance (m/ft) 133/436.4 210/689.0
Length (mm/in.) 680/26.8 672/26.5
Width (mm/in.) 454/17.9 454/17.9
Height (mm/in.) 160/6.3 160/6.3
Weight (kg/oz.) 14/493.8 14/493.8
Interpupillary distance adjustment (mm/
in.)
58-74/2.3-2.9 58-74/2.3-2.9
Diopter adjustment (m -1 ) -5 - +3 -5 - +3
Structure
Waterproof (up to 2 m/6.6 ft for 10 minutes) *2 and nitrogen gas
filled
*1 Apparent field of view is calculated based on the ISO14132-1:2002 standard
The number calculated by the formula [tan ω’ = Γ x tanω ]: Apparent field of view: 2ω’,
Magnification: Γ , Real field of view: 2ω
*2 The binocular telescope is waterproof, and will suffer no damage to the optical system if
submerged or dropped in water to a maximum depth of 2 m/6.6 ft for up to 10 minutes.
Fork mount
Tilting angle (Upward) (°) 70
Tilting angle (Downward) (°) 30
Horizontal rotation (°) 360
Height (mm/in.) 407/16.0
Width (mm/in.) 406/16.0
Weight (kg/oz.) 5.5/194.0