Compact binoculars polycarbonate frame twist up eyecups area of use travel nature bird watching magnification 10 x lens diameter 32 mm prism system roof exit pupil diameter 32 mm angle of view 58 field of view in 1000 m 101 m twilight factor 18 relative brightness 10 focussing system central focus viewing straight binocular coating fully multi coated weight 510 g eye relief 14 included in delivery lanyard lens caps rainguard pouch clean