Compact binoculars area of use theatre golf travel magnification 8 x lens diameter 21 mm prism system roof exit pupil diameter 262 mm angle of view 172 field of view in 1000 m 131 m twilight factor 1296 relative brightness 5 3 focussing system central focus viewing straight binocular weight 170 g special features for spectacle wearers rubber armouring outdoor functions waterproof shockproof