The name in hunting and birding binoculars, Swarovski, delivers the world's best performance for the serious mountain hunter, hiker, or outdoor enthusiast. Swarovski's EL 10x42 features the highest optical performance available! The EL series features excellent sharpness and low light (twilight) performance. Their balance is unmatched and are a perfect companion for the mountain hunter! Technical Data Magnification - 10x Effective objective lens diameter - 42 mm Exit pupil diameter - 4.2 mm Exit pupil distance (eye relief) - 20 mm Field of view (ft/1000 yds / m/1000 m) - 336 / 112 Field of view - 6.4° Field of view, apparent - 60° Shortest focusing distance - 4.9 ft / 1.5 m Light transmission - 90% Interpupilary distance - 2.2-2.9 in/ 56-74 mm Technical Data Length - 6.3 in/ 160 mm Width - 5.2 in/ 131 mm Height - 2.4 in/ 61 mm Weight - 29.6 oz / 840 g Functional temperature -13 °F to +131 °F (-25 °C / +55 °C) Storage temperature -22 °F to +158 °F (-30 °C / +70 °C) Submersion tightness - 13 ft / 4 m water depth (inert gas filling)