Compact binoculars area of use travel magnification 8 x lens diameter 20 mm prism system roof exit pupil diameter 25 mm min focus distance 18 m angle of view 65 field of view in 1000 m 113 m twilight factor 126 relative brightness 6 25 diopter correction 3 5 dpt viewing straight binocular weight 240 g outdoor functions waterproof anti fog nitrogen filled dustproof