Vortex 15x56 Diamondback HD Binoculars. The Vortex 15x56 Diamondback HD Binoculars deliver long-range viewing performance with oversized 56mm extra-low dispersion (ED) high-definition (HD) lenses, proprietary multicoatings, and dielectric-coated, phase-corrected roof prisms for vivid, true-color images that are bright, sharp, and distortion-free across the field of view. ArmorTek lens coatings repel water, oil, and dirt, ensuring clear and scratch-free optics. Built for comfort and durability, the lightweight magnesium alloy housing is wrapped in a rubber armor for a secure, slip-resistant grip, while raised palm pads and thumb indents improve hand stability. The binoculars are argon-filled and O-ring sealed for waterproof and fog-proof reliability in extreme conditions. Weighing over two pounds, tripod mounting is recommended to reduce hand fatigue, and a Uni-Dapter tripod adapter is included. For convenient field use, a harness system transfers weight from the neck to the shoulders, and a protective case is also included. Optical performance: designed for long-distance and low-light observation, 15x magnification, 56mm objective lenses, roof prism design, dielectric and phase-corrected coatings for enhanced contrast and color accuracy, extra-low dispersion HD glass to eliminate chromatic aberration, fully multicoated lenses for improved light transmission, ArmorTek coatings for lens protection, 65.4° apparent angle of view, and 230' field of view at 1000 yards. Professional Cleaning Kit: includes an air blower for contact-free cleaning, sensor cleaning swabs, cleaning cloths, lens cleaning pen and brush, and a hard carrying case for organized storage. Package contents: hard carrying case, 15.75" x 15.75" cleaning cloth, 6" x 7" cleaning cloth, air blower, Vivitar ammonia- and alcohol-free lens cleaner, sensor cleaning swab, lens tissue paper, cleaning pen, and cleaning brush. This bundle from Teds Electronics includes: Vortex 15x56 Diamondback HD Binoculars DB-218 and Professional Cleaning Kit. MPN: DB-218-1K, UPC: 875874007420.