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 25 m angle of view 53 field of view in 1000 m 93 m twilight factor 205 relative brightness 17 64 focussing system central focus viewing straight binocular coating fully multi coated weight 678 g special features rubber armouring outdoor function waterproof