Outdoor binoculars area of use nature outdoor sports magnification 10 x lens diameter 42 mm prism system porro exit pupil diameter 42 mm min focus distance 36 m angle of view 61 field of view in 1000 m 107 m twilight factor 205 relative brightness 17 64 focussing system central focus viewing binocular straight weight 700 g eye relief 15 prismenglas bak 4