Image stabilised binoculars area of use travel watersports magnification 18 x lens diameter 50 mm prism system porro exit pupil diameter 278 mm min focus distance 6 m angle of view 37 field of view in 1000 m 64 m twilight factor 30 relative brightness 7 73 focussing system central focus viewing straight binocular coating fully multi coated weight 1 200 g special features for spectacle wearers rubber armouring