Celestron has designed and engineered the largest SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions. Our large aperture powerful binoculars ensure high performance in all weather conditions and are ideal for astronomical viewing, or terrestrial use. Each SkyMaster model features high-quality BaK-4 prisms and multi-coated optics for enhanced contrast, with bright, sharp image quality—even in dim conditions. A practical integrated tripod adapter rod allows you to enjoy extended hands-free viewing sessions by simply mounting your SkyMaster binoculars on any sturdy photographic tripod. Our SkyMaster model features soft, rubber eyecups that block stray light and are comfortable to use. Eyeglass wearers can fold down the eyecups to enjoy a better viewing experience. For maximum stability and secure optical alignment, the 80mm SkyMaster model features enhanced structural reinforcement to the main binocular body. The purchase of our Celestron SkyMaster 20x80 binoculars includes an objective lens cap, a rainguard, a deluxe carrying case, a neck strap, a lens cloth, and an instruction manual. Buy with confidence from the world's No.1 telescope brand and a leading binocular manufacturer, based in California since 1960.