Swarovski NL Pure 8x42 Full-Size Binoculars - Keep the overview. The 8x magnification in combination with the enormous field of view lets you completely immerse yourself in nature - even during the late hours of the night. 8x Magnification 42 mm Effective objective lens diameter 5.3 mm Exit pupil diameter 18 mm Exit pupil distance 477 ft/1000 yds Field of view at m/1,000 m / ft/1,000 yds 9.1 deg Field of view degrees 9.1 deg Field of view with eye glasses (degrees) 69 deg 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 18.3 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. 29.5 oz Weight ENVIRONMENT & CONDITIONS -13 to +131 degF Functional temperature -22 to +158 degF Storage temperature 13 ft / 4 m water depth (inert gas filling) Submersion tightness