Compact binoculars metal multi stop twist up eyecups phase and dielectric coatings magnesium alloy body area of use nature bird watching hunting travel magnification 10 x lens diameter 42 mm prism system porro exit pupil diameter 42 mm angle of view 65 field of view in 1000 m 113 m twilight factor 20 relative brightness 18 focussing system central focus viewing straight binocular coating fully multi coated weight 635 g eye relief 15 addit