Waterproof up to 1m for 5mins and nitrogen filled with spherical eyepiece lens for minimum distortion and longer eye relief. Wide field of view, bright image, multilayer coated lenses, optional tripod adapter. Multilayer coated lenses, click-type dioptre adjustment ring, high eye point. For Spectator Sports, Hiking, Bird watching, Nature Viewing, Hunting, Spectacle Wearers or Marine Sports.