Outdoor binoculars area of use nature bird watching outdoor sports magnification 6 x lens diameter 30 mm prism system porro exit pupil diameter 5 mm min focus distance 27 m angle of view 8 field of view in 1000 m 140 m twilight factor 134 relative brightness 25 focussing system central focus viewing straight binocular coating fully multi coated weight 490 g eye relief 20 special features rubber armouring outdoor function waterproof pri