Feature True 12x Zoom Factor, Edge-to-Edge Image, Fully-multi Coated, 100mm 4" Eye Relief 35mm Monotube Made of 6061 T6, Side Foucs Min Starts from 20 Yards to Infinite By Using ED Glass on Objective lens Ensure Excellet Image at 48x Power for Long Range Shooting 1/8MOA Adjustment w/ Zero Reset & Turret Lock Feature, Total >55MOA Adjustment Range Etched Glass MOA Reticle Make You Measure Distance and Calculate Bullet Drop Compensation Take Lapua Magnum 338 Recoil and All Fields of Application for Hunting, Sporting & Competition Specification Magnification: 4-48x Objective Lens Dia.: 65mm Ocular Lens Dia.: 39mm / 1.5 inch Ocular Lens Length: 66mm / 2.6 inch Exit Pupil: 12-1.35mm Optics Coating: Fully-multi coat Field of View: 26.7-2.3 feet@100 yards Field of View: 5.1-0.43Adeg Eye Relief: 104-94mm / 4.1-3.7 inch Length: 435mm / 17.1 inch Weight: 1140g / 40.2 ounce Tube Dia.: 35mm Monotube Click Value: 1/8 MOA Elevation Range: >55MOA Windage Range: >55MOA Parallax Setting: 100 yards Side Focus: 20 Yds to infinite Reticle: Etched glass MOA Illumination: 11 gear red Battery Type: CR2032 Reticle Usage at 10x Power Distance between objective lens part and middle turret: 74mm (1.8 inch) Length of middle turret part: 37mm (1.6 inch) Distance between middle turret part to power ring: 88mm (2.5 inch) Shock tested to 1200g and water proof Fully nitrogen purged to eliminate any fogging of the lenses internally High quality 6061 T6 aircraft grade aluminum Diopter compensation from fast-focus eyepiece (+2 to -3) Including items: 35mm picatinny high ring, 3" sunshade, flip-up caps and cleaning cloth etc. Reticle Service