Vector Optics Paragon 4-20x50 Scope 30mm Monotube VPA Etched Glass Reticle Super Sharp Clear by Using Germany Glass & Optical System, 1/10 MIL Adjust, 30mm Monotube Long Eye Relief, Illumination, Side Focus Min 25 Yards, Turrets w/ Lock Feature, VPA Etched Glass Reticle With Honeycomb Sunshade, Tactical Heavy Duty Mount Ring, Cleaning Cloth, 4KM Target Clear View Magnification:4-20x Objective Lens Dia:50mm Ocular Lens Dia:37mm (1.5 inch) Ocular Lens Length:52mm (2.0 inch) Exit Pupil:12.5-2.5mm Optics Coating:fully multi diamond coated Field of View:24.4-4.9 feet @ 100 yards Eye Relief:>100mm / > 4.0 inch Length:370mm (14.6 inch) Weight:625g (22.0 ounce) Tube Dia.:30mm Monotube Click Value:1/10 MIL (1cm, 0.1 MRAD) Elevation Range:15 MIL Windage Range:15 MIL Side Focus:25, 50, 100, 200, 400 and infinite Parallax Setting:100 yards Reticle:VPA-2 etched glass Illumination:Stepless style Battery:CR2032 Distance between objective lens part and middle turret: 66mm (2.6 inch) Length of middle turret part: 42mm (1.6 inch) Distance between middle turret part to power ring: 44mm (1.7 inch) Turret lock system, pull adjust and press to lock Mini focus at 20x power can reach 25 yards with our test Shock tested to 750g, 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 (+1.5 to -2) Including items: 30mm tactical picatinny ring, lens caps and honeycomb sunshade, cleaning cloth