Made for hunters who demand hard-working, reliable optics, the Diamondback HD delivers sharp resolution, enhanced contrast, and rugged durability. Lightweight yet tough enough to go the distance, it s a strong lineup designed to handle any kind of hunt. A true workhorse, Diamondback HD gives you the clarity, utility, and trust you need to consistently punch more tags. HD Optical System 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 Lenses Anti-reflective coatings on all air-to-glass surfaces provide increased light transmission for greater clarity and low-light performance. Dielectric Prism Coatings Multi-layer prism coatings provide bright, clear, color-accurate images. True Open Hinge Offers superior ergonomics while decreasing total weight and bulk. 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. Phase Correction Coating on roof prism models enhances resolution and contrast. 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. Argon-Gas Purged Gas purged and O-ring sealed for fogproof and waterproof performance in all conditions. Waterproof Designed to withstand harsh weather conditions. Fogproof Designed to withstand a wide range of temperatures. Shockproof Designed to withstand the highest levels of impact. Product Specifications Magnification: 10x Objective Lens: 42mm Eye Relief: 15.0mm Angular Field of View: 6.3 Linear Field of View: 330' @ 1000 yds Close Focus: 5.0' Interpupillary Distance: 55mm - 73mm Height: 5.7" Width: 5.1" Weight: 21.3 oz