Meostar Binoculars represent the ideal blend of high-performance European optics with optical quality and an affordable price. At the heart of these innovative binoculars is the MB-550 lenses that have been treated with a multilayer, ion-assisted anti-reflective coating to improve light transmission to an astounding 99.8% per glass surface. The result is optical clarity typically associated with binoculars costing significantly more. These roof-prism binoculars have been coated for phase correction to guarantee superior clarity and color definition. The streamlined, ergonomic design makes them comfortable enough to glass all day long. For a lifetime of use, the frames are constructed of a solid aluminum alloy coated with a rugged rubber armor. Convenient screw-in eyecups accommodate eyeglass wearers. Single oversized center focus wheel has a built-in diopter for fast single-finger adjustment. Schmidt-design roof prisms for maximum light transmission. Nitrogen-purged and sealed for fog- and waterproof performance. Wide, comfortable neck strap.