Compact binoculars underwater binoculars area of use travel watersports magnification 10 x lens diameter 44 mm prism system roof exit pupil diameter 444 mm min focus distance 2 m angle of view 64 field of view in 1000 m 112 m twilight factor 21 relative brightness 19 36 focussing system central focus viewing straight binocular coating high contrast weight 850 g colour black operating temperature 40 80c included in delivery pouch ey