Celestron's legendary SkyMaster binoculars get an upgrade with ED lenses for superior images that are virtually free of chromatic aberration, with true-to-life colours, increased resolution and enhanced contrast Greate 70mm objective lenses provide excellent light gathering power - perfect for astronomy The threaded eyepieces are suitable for all standard 1.25" astronomy eyepiece filters to bring out detail or reduce the effects of light pollution. BaK-4 prisms and fully multi-coated optics with XLT coating increase light transmission in the optical path for brighter, more detailed images The widely spaced objective lenses of the Porro prism optics provide improved 3-D visibility.r improved 3-D vision Eyeglass-friendly with generous eye relief and padded, rotating eyecups Durable, rubber-armoured housing with improved ergonomics for comfortable use in the field Tripod-compatible for extended viewing sessions.