Vector Optics Swift 1.25-4.5x26ir Riflescope Red And Green Illmination With Lens Caps And Weaver Style Rings 30mm Monotube, Wide Field of View, Long Eye Relief, Green & Red Illumination, Etched Glass Hunting Reticle, Excellent Optic Specification and Fit for Hard Recoil 5 levels red and green brightness illumination system 30mm Monotube Shock proof (1000g), Water Proofand Fog Proof (Nitrogen Purged) High quality aluminum alloy in durable black matte finish Feature 1/4" direct high finger windage and elevation adjustments with audible clicks for greater precision Fast focus adjustment at olcuar lens (diopter compensation) Free Fitting involved: 30mm Low weaver (default) or dovetail mount Magnification 1.25-4.5x Objective Lens Dia 26mm Ocular Lens Dia 35.5mm Ocular Length 62mm(2.44'') Exit Pupil 6.5-7.6mm Battery CR2032 Length 280mm (11.0'') Weight (net) 450g (15.9 Ounce) Eye Relief 96-135 mm (3.8-5.3 Inch) Field of View 5.4-18°(feet@100yds) Optics Coating Fully Multi Coated Num of Lens 10 Reticle Etched Glass R12 Evaluation Range ± 40 MOA Windage Range ± 40 MOA