Designed with the outdoor enthusiast in mind, waterproof and fully rubber armored. Phase coated BaK-4 prisms for increased contrast and resolution. Fully multi-coated optics provide brighter images by increasing light transmission through the entire optical path. Close focus of 9.8 feet for viewing nearby subjects. Sturdy, twist-up eyecups with multiple stops. Eyeglass friendly with 16 mm of eye relief.