Outdoor binoculars area of use nature travel outdoor sports magnification 8 x lens diameter 43 mm prism system roof exit pupil diameter 538 mm min focus distance 2 m angle of view 82 field of view in 1000 m 142 m twilight factor 185 relative brightness 28 94 viewing straight binocular coating fully multi coated weight 743 g eye relief 16 outdoor function waterproof