Extendable telescope monocular area of use nature travel bird watching hunting magnification 30 x lens diameter 50 mm prism system roof suitable for beginner expert intermediate exit pupil diameter 167 mm angle of view 31 field of view in 1000 m 54 m twilight factor 387 relative brightness 2 79 diopter correction 5 0 dpt focussing system individual focus viewing monocular coating multi coated weight 450 g included in delivery pouch