Outdoor binoculars area of use outdoor sports magnification 8 x lens diameter 32 mm prism system roof exit pupil diameter 4 mm min focus distance 15 m angle of view 75 field of view in 1000 m 131 m twilight factor 16 relative brightness 16 diopter correction 4 0 dpt focussing system central focus viewing binocular straight weight 660 g outdoor function waterproof