Vortex Diamondback HD 8x42 Roof Prism Binoculars are exceptional optics with a lifetime guarantee so you can use with confidence in all outdoor environments. These durable optics are made with High Density extra-low dispersion glass that delivers excellent resolution and colours fidelity, resulting in high definition images. Made with a roof prism, the Diamondback HD 8x42 is a compact optic, with a Glasspak harness and case, perfect for keeping close at hand when stalking, hunting or at home watching the local wildlife. These versatile binoculars feature multi-position eyecups that can twist up or down for immediate, precise settings for comfortable viewing with or without glasses. The outer skin - rubber armour - provides secure and durable, non-slip external protection. Its outer lenses are protected by ArmourTek, an exceptionally hard, scratch-resistant coating that repels dirt, oil and the corrosive salt found in fingerprints. Waterproof O-ring seals prevent moisture, dust and debris from penetrating the binocular for reliable performance in all environments. These precision, robust binoculars by Vortex include a rainguard eyepeice cover, tethered objective lens covers, comfortable neck strap and a sturdy Glasspak binocular harness and case. Made with premium High Density extra-low dispersion glass for outstanding resolution and colour ArmourTek coated lenses to help protect against oil, scratches, dirt and fingerprint salts Fully multi-coated lenses for increased light transmission Multiple anti-reflective coatings on all air-to-glass surfaces Multi-layer prism coatings that provide bright, clear, colour-accurate images Constructed with a roof prism for greater durability and a more compact size Comes with robust carry case, comfortable neck strap, tethered objective lens covers and rainguard eyepiece cover Multi-positional eyecups for precise comfortable viewing Right eye diopter to adjust to different eye distances Magnification: 8x Objective Lens Diameter: 42mm Eye relief: 17mm Exit Pupil: 5.25mm Angular field of view: 8 degrees Close focus: 1.52m / 5ft Iterpupillary distance: 55-73mm Height: 145mm / 5.7 inches Width: 130mm / 5.1 inches Weight: 620g / 21.8 ounces