Vortex Razor HD Full-Size Binoculars - 8x42 - Extreme terrain and unimaginable conditions test your mettle—and your optics. Razor HD binoculars are a step up and out from other binoculars in their class. Lightweight, bright and strong, these binoculars feature a best-in-class HD optical system that delivers the sharpest images possible. APO System: Index-matched lenses correct color across the entire visual spectrum HD Lens Elements: Premium extra-low dispersion glass delivers the ultimate in resolution and color fidelity, resulting in high-definition images XR Plus Fully Multi-Coated: Ultimate anti-reflective coatings on all air-to-glass surfaces provide maximum light transmission for peak clarity and the pinnacle of low-light performance Dielectric Coating: Multi-layer prism coatings provide bright, clear, color-accurate images Plasma Tech: Cutting edge coating application process provides unparalleled coating durability and performance Phase Correction: Coating on roof prism models enhances resolution and contrast Roof Prism: Valued for greater durability and a more compact size True Open Hinge: Offers superior ergonomics while decreasing total weight and bulk Magnesium Chassis: Decreases weight and increases strength 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 Diopter: Adjusts for differences in a user's eyes. Located on right eyepiece Tripod Adaptable: Compatible with a tripod adapter, allowing use on a tripod or car window mount