Vortex 10x50 Diamondback HD Binoculars. Featuring powerful 10x magnification and large 50mm objective lenses, the Vortex 10x50 Diamondback HD Binoculars provide bright, detailed views even in low-light conditions, making them ideal for birding, hunting, and outdoor observation. These binoculars can be tripod-mounted with a separately sold adapter and include a Vortex GlassPak harness for comfort during extended use. The Diamondback HD optical system delivers minimal chromatic aberration, exceptional color accuracy, edge-to-edge sharpness, and optimal light transmission through ultra-high-definition glass, index-matched lenses, XR Plus lens coatings, and dielectric-coated, phase-correcting roof prisms. ArmorTek exterior coatings protect against scratches, oil, and dust. The argon-filled, O-ring-sealed housing ensures waterproof and fog-proof durability, while the rubber-armored body offers a secure, non-slip grip. A large, easy-to-use focus knob and twist-down eyecups make adjustments smooth and comfortable, even with gloves or glasses. The ergonomic design promotes natural hand placement, enhancing comfort for long sessions. Optical performance: roof prism design, 10x magnification, 50mm objective lenses, fully multi-coated optics for clarity and brightness, dielectric and phase-corrected prisms for true color and contrast, 6° angle of view, 315' field of view at 1000 yards, 6' close focus distance, 5mm exit pupil, and 17mm eye relief. Use and handling: short-hinge bridge for reduced weight and improved grip, adjustable interpupillary distance (60–75mm), oversized knurled focus wheel, right-eye diopter ring, and twist-up tapered eyecups. Construction details: GlassPak harness with zippered accessory pocket, protective rubber armor, waterproof and fog-proof performance, and scratch-resistant ArmorTek lens coatings. MPN: DB-216, UPC: 875874009950.