Zoom binoculars outdoor binoculars hunting binoculars area of use nature hunting outdoor sports magnification 22 x lens diameter 50 mm zoom factor 22 times prism system porro exit pupil diameter 227 mm min focus distance 6 m angle of view 63 field of view in 1000 m 110 m twilight factor 332 relative brightness 5 15 focussing system central focus viewing straight binocular coating multi coated weight 969 g eye relief 14 special feature