Universal binocular area of use travel watersports magnification 9 x lens diameter 28 mm prism system roof exit pupil diameter 311 mm min focus distance 3 m angle of view 56 field of view in 1000 m 97 m twilight factor 159 relative brightness 9 67 diopter correction 4 0 dpt focussing system central focus viewing straight binocular coating multi coated weight 365 g eye relief 18 special features for spectacle wearers rubber armouring