Fujinon 25x150 ED-SX w/o mount (ED Glass)Fujinon 25x150 ED SX Astronomical Binocular w o mount is an extreme, long distance observation tool with a massive 150mm objective. With ED glass and anti reflective coatings on every lens surface, you can achieve enhanced resolution and edge delineation especially in distant, high contrast viewing such as with the night sky. Additionally the Fujinon ED SX accepts the Polaris series of eyepiece filters for perfect astronomical observation.