Universal binocular area of use travel watersports magnification 7 x lens diameter 50 mm prism system porro exit pupil diameter 714 mm angle of view 75 field of view in 1000 m 131 m twilight factor 187 relative brightness 50 98 diopter correction 4 0 dpt focussing system central focus viewing straight binocular coating fully coated weight 830 g eye relief 56 special features for spectacle wearers outdoor function waterproof