Underwater binoculars area of use nature watersports magnification 8 x lens diameter 25 mm prism system roof exit pupil diameter 31 mm min focus distance 5 m angle of view 63 field of view in 1000 m 110 m twilight factor 141 focussing system central focus viewing straight binocular coating fully multi coated included in delivery pouch special features for spectacle wearers rubber armouring outdoor function waterproof