Universal binocular area of use outdoor sports travel magnification 10 x lens diameter 42 mm prism system roof suitable for beginner intermediate exit pupil diameter 42 mm min focus distance 2 m angle of view 57 field of view in 1000 m 100 m twilight factor 205 relative brightness 17 64 focussing system central focus viewing straight binocular coating high contrast weight 706 g material polycarbonate colour black operating temperature