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http://shopping.msn.com/specs/ni ... noculars-12-x-25-cf
Product details
General
Optical System Binoculars
Length 4 in
Width 4.6 in
Weight 9.2 oz
Optical System
Magnification 12 x
Objective Lens Diameter 25 mm
Prism System Porro
Exit Pupil 2.1 mm
Eye Relief 11.1 mm
Focus System Center focus
Lens Coating Multicoated
Min Focus Range 13 ft
Focus Adjustment Manual
Max View Angle 4.2 degrees
Relative Brightness 4.4
Field Of View 220 ft / 1000 yds
Lens System Features Aspherical lens
Features Rubber coating
上面说的70度是相对视角,眼睛看到的视野的圆圈的范围。绝对视角是4.2度,重量只有290克左右,非常轻便。
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