Outdoor binoculars area of use travel nature outdoor sports magnification 8 x lens diameter 42 mm prism system roof exit pupil diameter 525 mm min focus distance 25 m angle of view 68 field of view in 1000 m 118 m twilight factor 183 relative brightness 27 56 focussing system central focus viewing straight binocular coating fully multi coated weight 665 g special features rubber armouring outdoor function waterproof