Vortex Diamondback HD Binoculars - 10x50 - The Diamondback HD smashes the scale of price vs performance, delivering a rock-solid optic that optically punches high above its class. The included GlassPakTM binocular harness keeps your glass close at hand, ready to deploy at a moment's notice, all while providing protection and significantly more comfort than traditional neck straps. Optimized with select glass elements to deliver exceptional resolution, cut chromatic aberration and provide outstanding color fidelity, edge-to-edge sharpness and light transmission Fully Multi-Coated increases light transmission with multiple anti-reflective coatings on all air-to-glass surfaces Multi-layer prism coatings provides bright, clear, color-accurate images Rubber Armor provides a secure, non-slip grip, and durable external protection O-ring seals prevent moisture, dust and debris from penetrating the binocular for reliable performance in all environments Argon gas purging prevents internal fogging over a wide range of temperatures Rugged construction withstands recoil and impact 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 Diopter: Adjusts for differences in a user's eyes. Located on right eyepiece ArmorTek: Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt Package includes: GlassPak binocular case, GlassPak case harness, Comfort neck strap, Tethered objective lens covers, Rainguard Eyepiece Cover, Lens Cloth