Outdoor binoculars area of use nature outdoor sports magnification 8 x lens diameter 42 mm prism system porro exit pupil diameter 525 mm min focus distance 37 m angle of view 83 field of view in 1000 m 145 m twilight factor 183 relative brightness 27 56 focussing system central focus viewing straight binocular coating fully multi coated weight 765 g eye relief 16 special features rubber armouring prismenglas bak 4