Universal binocular area of use watersports travel nature magnification 10 x lens diameter 42 mm prism system roof suitable for beginner intermediate exit pupil diameter 42 mm angle of view 58 field of view in 1000 m 101 m twilight factor 205 relative brightness 17 64 focussing system central focus viewing straight binocular weight 710 g colour black included in delivery shoulder strap pouch special features for spectacle wearers outdoo