Universal binocular area of use bird watching travel magnification 7 x lens diameter 50 mm prism system porro exit pupil diameter 714 mm angle of view 67 field of view in 1000 m 116 m twilight factor 187 relative brightness 50 98 focussing system central focus viewing straight binocular coatings fully multi coated bak4 weight 1 170 g special features for spectacle wearers rubber armouring outdoor function waterproof