Superior optical design for aberration-free observation built especially for astronomical use Multilayer-coated lenses for a bright image. Waterproof up to 5m/16.4 ft. (2m/6.6 ft. for 10x70IF SP WP) for 5 minutes and fog-free with O-ring seals and nitrogen gas High-eyepoint design Can be fixed to a tripod using optional tripod adaptor Polarising filter and horn-shaped rubber eyecup are available (options)