The Vortex Viper HD 11-33x50mm is a lightweight, versatile spotting scope designed for hunters and long range shooters alike. Available in angled and straight options, the Viper HD 11-33x50mm Spotting Scope is outfitted with Vortex’s renowned HD Optical System. This designed uses a combination of select glass elements to deliver exceptional resolution and color fidelity, boost edge-to-edge sharpness and light transmission while also reducing chromatic aberration. Optical quality is further enhanced thanks to the use of dielectric prism coatings as well as Vortex’s XR Plus lens coating that helps enhance image quality in low light environments. To protect the optics, the lenses are then given an Armortek lens coating for defense against oils, dirt, and scratches. The Viper HD 11-33x50mm uses dual focusing knobs for making both large and small adjustments. Additionally, the Viper HD 11-33x50mm is outfitted with rubber armor to protect the scope from minor drops and impacts. Features of the Vortex Viper 11-33x50mm: Available in angled or straight configurations HD Optical System XR Plus Lens Coating Armortek Lens Coating Rubber Armor Coating Vortex Optics Like New Vortex Viper HD 11-30x50mm Straight Spotting Scope VPR-50S