Monocular area of use watersports golf astronomy bird watching magnification 8 x lens diameter 21 mm prism system roof exit pupil diameter 24 mm min focus distance 3 m twilight factor 132 focussing system central focus viewing monocular coating fully multi coated weight 82 g included in delivery pouch lanyard special features for spectacle wearers outdoor function waterproof prismenglas bak 4