STUNNING APPEARANCE AND OPTICAL BRILLIANCE These 8A-42 and 10A-42 binoculars are able to gather up to 96% light transmission because, aside of being phase corrected, they also feature another even more professional treatment that is called "Silver Coating". Furthermore, they are also waterproof and come with a truly superb-looking Open Hinge design. They are therefore a high-end option that are engineered to satisfy the most demanding users. Features: Green-coated optics Super lightweight Extra-large eyepieces Phase corrected Open bridge construction Bak-4 prisms Nitrogen filled Super wide angle Waterproof Rubber coating Central focusing