Universal binocular area of use travel nature magnification 8 x lens diameter 42 mm prism system roof exit pupil diameter 53 mm min focus distance 4 m angle of view 78 field of view in 1000 m 136 m twilight factor 183 relative brightness 14 06 diopter correction 4 0 dpt viewing straight binocular weight 810 g special features for spectacle wearers outdoor function waterproof