Compact binoculars polycarbonate frame twist up eyecups area of use travel nature bird watching magnification 10 x lens diameter 25 mm prism system porro exit pupil diameter 25 mm angle of view 6 field of view in 1000 m 104 m twilight factor 16 relative brightness 6 25 focussing system central focus viewing straight binocular coating fully multi coated weight 343 g eye relief 14 included in delivery lanyard lens caps rainguard pouch clea