Outdoor binoculars area of use golf bird watching travel nature outdoor sports magnification 10 x lens diameter 42 mm prism system roof exit pupil diameter 42 mm min focus distance 3 m angle of view 6 field of view in 1000 m 104 m twilight factor 205 relative brightness 17 64 focussing system central focus viewing straight binocular coating fully multi coated weight 790 g special features for spectacle wearers rubber armouring outdoor fun