The legendary SkyMaster binoculars from Celestron receive an upgrade with ED objectives for superior images that are nearly free of chromatic aberrations, featuring lifelike colors, increased resolution, and improved contrast. The large 80mm objective lenses provide excellent light-gathering ability, making them perfect for astronomy. The threadless eyepieces are compatible with all standard 1.25" astronomy eyepiece filters to enhance details 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 design offer improved 3D viewing. They are eyeglass-friendly with generous eye relief and padded, twist-up eyecups. The durable, rubber-armored housing provides enhanced ergonomics for comfortable use in the field and is compatible with tripods for longer observation sessions.