Compact binoculars area of use travel magnification 10 x lens diameter 28 mm prism system roof exit pupil diameter 28 mm min focus distance 4 m angle of view 57 field of view in 1000 m 99 m twilight factor 167 relative brightness 7 84 focussing system central focus viewing binocular straight weight 397 g special features rubber armouring outdoor function waterproof