Universal binocular area of use travel nature magnification 15 x lens diameter 56 mm prism system roof exit pupil diameter 373 mm min focus distance 8 m angle of view 44 field of view in 1000 m 77 m twilight factor 29 relative brightness 13 91 diopter correction 5 0 dpt viewing binocular straight weight 1 290 g outdoor function waterproof