This scope, with the CF500 illuminated reticle, and its multicoated lenses, is designed for use as a low light scope. The illuminated reticle allows a choice of green when the light is dim or red when bright. It is optimized for centerfire rifles with aiming points out to 500 yards. With a fast focus eyepiece and fingertip adjustment for windage and elevation this 4-16x40 configuration of magnification range and full sized objective lens is an all-around configuration with the long-range accuracy of Bushnell's CF500 illuminated reticle. Banner 4-16x40 Features: Product # 714164B, Matte Finish, Multi-Coated Optics, Reticle:- CF 500, Dry-Nitrogen Filled, 1/4 MOA Fingertip Windage & Elevation Adjustments, Completely Waterproof & Fog Proof, Fast-Focus Eyepiece, Specifications: Magnification: 4-16x, Objective Lens Diameter: 40mm, Field of View (@100 yds): 22-6 ft, Exit Pupil (mm): 10 - 2.5 mm, Eye Relief (mm): 83 mm, Mounting Length: 5.8 Inch, Click Value: 0.25 Inches @ 100 Yards, Adjustment Range: 70 Inches @ 100 Yards"