The Diamondback loaded with features! First, the solid one-piece aircraft-grade aluminum alloy construction makes the Diamondback riflescope virtually indestructible and highly resistant to magnum recoil. Argon purging puts waterproof and fogproof performance on the agenda, and advanced fully multi-coated optics raise an eyebrow when crystal clear, tack-sharp images appear in the crosshairs. Look for all this and more in a riflescope you would expect to cost quite a bit more-but doesnt. We can live with that. Features Fully Multi-Coated Second Focal Plane Reticle 1-inch Diameter Tube Aircraft-Grade Aluminum Waterproof Fogproof Shockproof Dead-Hold BDC Reticle Customized dot design helps eliminate guesswork on holdover and windage corrections. Good for hunting/shooting at varying ranges where estimating holdover is a concern. Product Specifications Magnification: 4-12x40 Objective Lens Diameter: 40 mm Eye Relief: 3.1 inches Field of View: 32.4-11.3 feet/100 yards Tube Size: 1 inch Turret Style: Capped Adjustment Graduation: 1/4 MOA Travel per Rotation: 15 MOA Max Elevation Adjustment: 60 MOA Max Windage Adjustment: 60 MOA Parallax Setting: 100 yards Length: 12 inches Weight: 14.6 ounces