From the Manufacturer:
Flagship Kowa ultra compact binocular featuring Kowa legendary XD optics.
Pocket sized 22mm objective lens model of the GENESIS PROMINAR range features 4 Kowa high grade XD objective lenses (2x sets). This high resolution ED glass contains large amounts of fluorite crystal - the best material available today for light transmission resulting in a simply stunning view of the natural world. Kowa lens coating technology developed over decades, further enhance the light transmission properties of all lenses and Kowa’s unique KR coating repels dirt and fluid. Experience pin sharp images with natural colour, high contrast and breathtaking detail virtually free from any chromatic aberration (colour fringing). Ergonomic styling combined with tactile materials makes handling the GENESIS PROMINAR a dream. Hold a GENESIS PROMINAR and you will instantly appreciate the high quality engineering. Built to last a lifetime - each component in the GENESIS PROMINAR range is meticulously designed to provide the ultimate viewing experience. GENESIS PROMINAR are fully waterproof and dry nitrogen filled to prevent fogging. A tough rubber armour make the GENESIS PROMINAR an extremely durable and reliable binoculareven in the toughest of environments. Performance guaranteed.