Item: SCOL-34 Magnification: 10-40x 30mm Monotube Objective Lens: 50mm Ocular Lens Dia: 44mm (1.7'') Ocular Length: 67mm (2.6'') Exit Pupil: 5.0 - 1.25mm Length: 405mm (15.9'') Weight (net): 750g / 26.5oz Eye Relief: 92-85mm / 3.6-3.3 inch Field of View (ft@100yds): 3.8-1.1° Optics Coating: Fully-multi coated Reticle: Etched glass COM-25M Click Value: 1/8MOA Evaluation Range: 50MOA Windage Range: 50MOA Parallax Adjustment: 10 Yds to infinite Finish: Black matte Illumination: N/A Exclusive for air gun and 22LR rimfire etc bench rest shooting and competition at 25 meters target The reticle is designed to match the standard size of bench rest shooting target Reticle Used at 40x Power, 1.5mm Center Dot Perfect Matches Target 2mm Dia. Bull-eye Reticle each graduation on horizontal line coincides with all target rings Side focus knob marked 25, 50, 100M to infinite Distance between objective lens part and middle turret: 77mm (3.0 inch) Length of middle turret part: 38mm (1.5 inch) Distance between middle turret parts to power ring: 56mm (2.2 inch) Shock tested to 750g, waterproof and fully nitrogen purged Turret lock system. Pull to adjust, press to lock High quality 6061 T6 aircraft grade aluminum Diopter compensation from fast-focus eyepiece -2 to +1.5 Including items: cleaning cloth, instruction and filp-up cap Optional: Weaver rings or Dovetail rings