Outdoor binoculars area of use travel outdoor sports magnification 10 x lens diameter 50 mm prism system roof exit pupil diameter 5 mm min focus distance 25 m angle of view 53 field of view in 1000 m 93 m twilight factor 224 relative brightness 25 viewing straight binocular coating fully multi coated weight 812 g special features rubber armouring outdoor function waterproof