Outdoor binoculars area of use nature travel outdoor sports magnification 10 x lens diameter 42 mm prism system roof exit pupil diameter 42 mm min focus distance 15 m angle of view 66 field of view in 1000 m 115 m twilight factor 205 relative brightness 17 64 focussing system central focus viewing straight binocular weight 692 g special features rubber armouring outdoor function waterproof