Compact binoculars area of use travel nature bird watching magnification 10 x lens diameter 56 mm prism system porro exit pupil diameter 56 mm min focus distance 3 m angle of view 6 field of view in 1000 m 104 m twilight factor 237 relative brightness 31 36 diopter correction 3 0 dpt focussing system central focus viewing straight binocular coating fully multi coated weight 1 000 g eye relief 18 material polycarbonate included in d