Vortex Optics Viper HD Full-Size Binoculars - 10x50 - Viper HD binoculars are an optical masterpiece, giving hunters, shooters and outdoor enthusiasts a premium option without the premium price tag. The HD optical system delivers stunning resolution, color fidelity and edge-to-edge clarity. These are one of the lightest, most compact, full-size binos on the market—a noteworthy attribute when gear consideration can be measured in grams. Includes GlassPak chest harness, keeping your binos at the ready while providing comfortable, protected, strain-free, all-day carry. HD Lens Element: Premium extra-low dispersion glass delivers the ultimate in resolution and color fidelity, resulting in high-definition images XR Fully Multi-Coated: Proprietary coatings increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces Dielectric Coating: Multi-layer prism coatings provide bright, clear, color-accurate images Phase Correction: Coating on roof prism models enhances resolution and contrast Roof Prism: Valued for greater durability and a more compact size Waterproof: O-ring seals prevent moisture, dust and debris from penetrating the binocular for reliable performance in all environments Fogproof: Argon gas purging prevents internal fogging over a wide range of temperatures ArmorTek: Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt Rubber Armor: Provides a secure, non-slip grip, and durable external protection Adjustable Eyecups: Twist up and down for comfortable viewing with or without eyeglasses Center Focus: Wheel Adjusts the focus of both binocular barrels at the same time Locking Diopter: Adjusts for differences in a user's eyes. Located on right eyepiece, locks at preferred setting Tripod Adaptable: Compatible with a tripod adapter, allowing use on a tripod or car window mount