These binoculars combine numerous proven design features with a broad power range and ergonomic design to maximize optical performance. Objective lens diameter of 50mm delivers excellent light transmission for dawn-to-dusk viewing. Lenses are carefully multicoated with anti-reflective elements for excellent brightness, sharpness and resolution through the full power range. Durable rubber armor provides shock resistance. Easily operable zoom control makes power changes a snap quick central focusing for convenience. BaK4 high-index porro prisms provide a clear, crisp image. Rubber eyecups can be folded back for use with eyeglasses. Includes neck strap, case and tripod adapter.