Vector optics' premium line can compete with most of the most popular optical brands in the world. 34 mm monotube in 6061 t6, first focal plane scope with german schott hd glass. german optical system using laree and vepro fmc lenses >90% light transmission. very little distortion, very low dispersion, excellent for shooting at dawn and dusk, even at night. true 6x zoom factor, constant 4-inch eye relief with no internal dark ring around the image. 6-level illumination, side focus parallax min starts from 10 yards to infinity. 7075 t6 adjustment system that never snags or twists. 1/10mil adjustment, zero stop and turret lock, 100 clicks per round, 44mil elevation range. vct-34ffp tactical mil reticle in etched glass, illuminated central dot with digital lines and dots. get the lapua magnum 338 recoil and all areas of application for hunting, sports and competition. magnification: 3-18x objective lens diameter: 50mm ocular lens diameter: 42mm/1.7in ocular lens length: 54mm/2.1in exit pupil: 8.0-2.8mm optics coating: vepro fully multi-coated field of view: 40.8-6.8 feet at 100 yards eye relief: 100 mm / 4.0 inches length: 338 mm / 13.3 inches weight: 820 g / 28.9 oz v tube diameter: 34 monotube mm click value: 1/10 mil elevation range: 44mil windage range: 16mil side focus: 10 yd to infinity reticle: etched glass vct-34ffp illumination: 6 gears battery type: cr2032 distance between the part of the objective and the central turret: 43 mm/1.7 inches length of the central part of the turret: 48 mm/1.9 inches distance between the central part of the turret and the power ring: 62 mm/2.4 inches tested against shocks up to 1000g, water resistant to 1 meter for 30 minutes fully nitrogen purged to eliminate any lens fogging internally 100 clicks per round, turret lock and zero stop function high quality 6061 t6 aircraft grade aluminum mass marking at focus: 10,15, 20, 30, 50, 100, 200, 300, 500 and infinity diopter compensation from rapid focus eyepiece (+2 to -3) items included: one pair of 34 picatinny scope rings mm, spare common elevation turret, sun visor, instructions, lens cap and cleaning cloth.