Field-tested in some of the toughest conditions on earth, these rugged, full-sized, roof-prism binoculars are loaded with features you find in top-end models costing twice as much. Tough, rubber-armored, fogproof and waterproof. Advanced roof prisms are phase-coated, noticeably improving image quality. High-quality multicoated lenses enhance light transmission and clarity. Infinitely adjustable friction center focus and diopter adjustments, twist-up eyecups, lens covers and a rain guard cover. Tripod adaptable.