Swarovski EL 10x50 Green Binoculars - EL 10x50 binoculars have a large field of view and a 5-mm exit pupil, enabling you to see bright images that are sharp in every detail, even in difficult light conditions. OBJECTIVE 10x Magnification 50 mm Effective objective lens diameter 5 mm Exit pupil diameter 20 mm Exit pupil distance 345 ft/1000 yds Field of view at m/1,000 m / ft/1,000 yds 6.6 ° Field of view degrees 6.6 ° Field of view with eye glasses (degrees) 62 ° Field of view apparent 9.2 ft Shortest focusing distance ± 4 dpt Diopter adjustment 5 dpt Diopter correction at ∞ 90 % Light transmission 2.2-2.9 in Pupil distance 22.4 Twilight factor acc. to ISO 14132-1 SIZE & WEIGHT 6.8 in Lenght in mm. 5.2 in Width in mm. 2.6 in Height in mm. 35 oz Weight ENVIRONMENT & CONDITIONS -13 to +131 °F Functional temperature -22 to +158 °F Storage temperature 13 ft / 4 m water depth (inert gas filling) Submersion tightness