Spotting scope area of use nature bird watching wildlife watching golf hunting magnification 20 x lens diameter 80 mm prism system porro exit pupil diameter 4 mm min focus distance 42 m angle of view 29 field of view in 1000 m 51 m twilight factor 40 relative brightness 16 viewing monocular 45 angled coating fully multi coated weight 2 300 g eye relief 18 colour black included in delivery pouch eyepiece special features for spectacle