Swarovski NL Pure Full-Size Binoculars - 10x42 - See more in every situation. Thanks to its perfect handling and the seemingly endless field of vision, the NL Pure 10x42 becomes even more versatile. OBJECTIVE 10x Magnification 42 mm Effective objective lens diameter 4.2 mm Exit pupil diameter 18 mm Exit pupil distance 399 ft/1000 yds Field of view at m/1,000 m / ft/1,000 yds 7.6 ° Field of view degrees 7.6 ° Field of view with eye glasses (degrees) 70 ° Field of view apparent 6.6 ft Shortest focusing distance ± 4 dpt Diopter adjustment 5 dpt Diopter correction at ∞ 91 % Light transmission 2.2-2.9 in Pupil distance 20.5 Twilight factor acc. to ISO 14132-1 SIZE & WEIGHT 6.2 in Lenght in mm. 5.1 in Width in mm. 2.8 in Height in mm. 30 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