Universal binocular area of use travel magnification 8 x lens diameter 42 mm prism system roof suitable for beginner intermediate exit pupil diameter 525 mm min focus distance 19 m angle of view 82 field of view in 1000 m 142 m twilight factor 183 relative brightness 27 56 focussing system central focus viewing straight binocular weight 665 g colour black special features rubber armouring outdoor function weatherproof format standard