Vortex Optics, a veteran-owned, family-owned business, has built a stellar reputation over the last thirty-six years for providing its clientele with exceptional optic solutions and by always putting customers in the center of everything the company does. Whether needing a tactical optic for Military and Law Enforcement use, hunting in the field with your companions, or practicing at the range, Vortex Optics solutions help bring your vision closer to the target than ever before. Features: 10 Power Magnification 42mm Objective Lens Diameter 58-75mm Interpupillary Distance 6-Inch Height 15mm Eye Relief 23 Ounce Weight The Crossfire High Definition 10x42 set of Vortex binoculars features ultra-large 42mm objective lenses for maximum light collection and offers extremely crisp imagery regardless of low-light conditions or heavy contrast backgrounds. Each tube is sight-optimized with select glass elements and optic coatings that deliver exceptional resolution. The Crossfire binocular lenses from Vortex Optics reduce chromatic anomalies and offer superior high-definition color imagery with edge-to-edge clarity. The lenses of the Crossfire also feature multiple anti-reflective coatings on all air to glass surfaces, and the durable aluminum alloy frame is covered in overmolded rubber armor for double protection and a non-slip positive grip. Vortex Optics nitrogen purges each tube, and o-ring seals them to ensure each lens tube offers the best water and fog-proof performance regardless of the environment. The Crossfire HD binoculars feature Dach roof prism technology which sends the optical in a straight path allowing a slimmer and more compact housing but providing superior vision. This set of Crossfire binoculars from Vortex Optics is an easy choice when looking for a set of HD optics that provides rugged high-end performance at a remarkable value.