Sweet 17 Rifle Scopes are designed for the serious hunter. The main features of the Sweet 17 are their ability to compensate for bullet trajectory by specific grain weight. The elevation drum will compensate for both .17/17HMR and .20gr. - RGB-red green blue GE glass etched reticle - Adjustable objective. - Includes .17/17HMR and .20gr turret drum - Limited Lifetime Warranty. - Magnification: 3-12 - Obj. Lens Diameter (mm): 40 - Exit Pupil Range (mm): 13.2-3 - Field of View @100 Yds: 31.4-8.3 - Optimum Eye Relief (in): 4 - Parallax Setting: 10 to Inf - Click Adjustment Value: 1/4 - Adjustment Range: 45-45 - Weight (ounces): 18.30