When success rides on the perfect shot, rely on the exceptional versatility and optical performance of Viper HD riflescopes. From predators to big game, river bottoms to the Rockies, theres a field-proven configuration for every hunting application. Ultra-rugged. Remarkably adaptable. Each member of the Viper HD family delivers outstanding image clarity, resolution, and sharpness to ensure your target comes into view with sharp detail. Viper HD also boasts enhanced features for unmatched accuracy at extended ranges while excelling in the low light of dawn and dusk when game is most active. Features: HD optical system Fully multi-coated lenses Armortek Waterproof Fogproof Shockproof Illuminated Zero system RevStop Specifications: Objective Lens Diameter: 44 mm Magnification: 3 - 15 x Reticle: Dead-Hold BDC MOA Tube Diameter: 30 mm Reticle Focal Plane: Second Focal Plane (SFP) Field of View, Linear: 39.9 - 8 ft at 100 yds Eye Relief: 3.4 in Color: Black Adjustment Click Value: 0.25 MOA Length: 17.75 in Adjustment Type: MOA Parallax: 20 yds to infinity Illumination Type: LED Battery Type: CR2032 Width: 3.75 in Fabric/Material: Aircraft Grade Aluminum Adjustment Range: 92 MOA Height: 4.5 in Optical Coating: Fully Multi-Coated Shockproof: Yes Fogproof: Yes