Specifications for Leica Magnus i 1.5-10x42 L-Plex Riflescope: Package includes: Riflescope caps for front lens/eyepiece, cleaning tissue Front lens diameter: 42 mm Magnification: 1.5 - 10 x Zoom: 6.7 x Field of view at max. magnification (m/100 m): 4.4 yds / 4.1 m Field of view at min. magnification (m/100 m): 28.4 yds / 26 m Eye relief: > 3.5 in / 90 mm Exit pupil: 4.2 - 12.4 mm Parallax: 100 m Diopter compensation: -4/+3 dpt Coating: AquaDura lens coating Transmission: approx. 91 % Mounting option: 30 mm tube / Zeiss internal track Impact point correction: 1 click = 1 cm/100 m (~~1/3 MOA), 150 x140 cm Front lens filter thread: M 46 x 0.75 mm Length: 124.8 in / 317 mm Weight: 21.9 oz / 620 g [with track Waterproof: waterproof to 13.1 ft / 4 m; nitrogen-filled Reticle illumination / type: yes/dot Automatic switch-off: 3 min, ± 75° Automatic switch-on: yes, activated by position and/or movement