Universal binocular area of use watersports travel nature magnification 8 x lens diameter 42 mm prism system roof suitable for beginner intermediate exit pupil diameter 525 mm min focus distance 18 m angle of view 72 field of view in 1000 m 126 m twilight factor 183 relative brightness 27 56 focussing system central focus viewing straight binocular coating fully multi coated weight 785 g eye relief 19 colour black outdoor function