Zoom binoculars hunting binoculars outdoor binoculars area of use nature hunting outdoor sports magnification 10 x lens diameter 50 mm zoom factor 3 times prism system porro exit pupil diameter 5 mm min focus distance 76 m angle of view 29 field of view in 1000 m 50 m twilight factor 224 relative brightness 25 focussing system central focus viewing straight binocular coating fully coated weight 680 g eye relief 9 special features rubb