Vector optics' premium line that competes with most of the most popular optics brands worldwide 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 6x true zoom factor, constant 4-inch eye relief, no internal dark rings around the image 30mm monotube made of 6061 t6, minimum side focus from 15 yards to infinity adjustment made from 7075 t6 never snags or spins 1/10mil adjustment with zero stop elevation and windage with turret lock, total range >20mil etched glass vct-20a reticle, all illuminated with digital line dots and 6-level illumination get the lapua magnum 338 recoil and all fields of application for hunting, sports and competition enjoy the highest quality of the brand at an affordable price, supplied with diy replacement elevation turret magnification : 4-24x objective lens diameter: 50mm ocular lens diameter: 42mm/1.7in ocular lens length: 54mm/2.1in exit pupil: 9.5-2.1mm optical coating: fully multi-layer coating diamond field of view: 31.1-5.2 feet at 100 yards field of view: 10.4-1.7 m at 100 meters eye relief: 100 mm/4.0 inches length: 370 mm/14.6 inches weight: 670g / 23.6oz tube diameter: 30mm monotube click value: 1/10 mil elevation range: >20mil (zero stop) windage range: >20mil (turret lock) parallax setting: 100 yards side focus: 15 yd to infinity reticle: vct-20a etched glass illumination: 6 gears battery type: cr2032 shock tested to 750g, water resistant to 1m fully nitrogen purged to eliminate any lens fogging internally turret block. supplied with zero reset function high quality 6061 t6 aircraft aluminum focus mark: 15, 20, 30, 50, 75, 100, 200, 300, 500 and infinity diopter compensation from fast focus eyepiece (from +2 to -3) items included: 30mm picatinny high rings, instructions, diy replacement elevation turret, lens cap and cleaning cloth, etc.