Universal binocular area of use watersports travel nature magnification 8 x lens diameter 42 mm prism system roof exit pupil diameter 525 mm min focus distance 25 m angle of view 63 field of view in 1000 m 110 m twilight factor 183 relative brightness 27 56 focussing system central focus viewing straight binocular coatings fully multi coated p2 phase coating v max coating emerald weight 640 g outdoor function waterproof