Swarovski NL Pure 12x42 Full-Size Binoculars -Detect every detail even at great distances. This is guaranteed by the 12x magnification. Even with an objective lens diameter of 42 mm, the unique ergonomics together with the forehead rest allow you to observe with ease for a long time OBJECTIVE 12x Magnification 42 mm Effective objective lens diameter 3.5 mm Exit pupil diameter 18 mm Exit pupil distance 339 ft/1000 yds Field of view at m/1,000 m / ft/1,000 yds 6.5 deg Field of view degrees 6.5 deg Field of view with eye glasses (degrees) 71 deg Field of view apparent 8.5 ft Shortest focusing distance 4 dpt Diopter adjustment 5 dpt Diopter correction at 91 % Light transmission 2.2-2.9 in Pupil distance 22.4 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