Universal binocular area of use travel nature magnification 10 x lens diameter 42 mm prism system roof exit pupil diameter 42 mm min focus distance 2 m angle of view 57 field of view in 1000 m 100 m twilight factor 205 relative brightness 17 64 focussing system central focus viewing straight binocular weight 800 g special features rubber armouring outdoor function waterproof