Universal binocular area of use watersports travel nature magnification 10 x lens diameter 30 mm prism system roof exit pupil diameter 3 mm min focus distance 2 m angle of view 67 field of view in 1000 m 117 m twilight factor 1732 relative brightness 9 focussing system central focus viewing straight binocular coating multi coated weight 440 g eye relief 56 included in delivery lens caps shoulder strap special features for spectacle wear