Outdoor binoculars area of use travel outdoor sports magnification 10 x lens diameter 28 mm prism system roof exit pupil diameter 28 mm min focus distance 4 m angle of view 49 field of view in 1000 m 86 m twilight factor 167 relative brightness 7 84 focussing system central focus viewing straight binocular weight 260 g special features rubber armouring outdoor function waterproof