Celestron"s SkyMaster Series of large aperture binoculars are a phenomenal value for high performance binoculars ideal for astronomical viewing or for terrestrial (land) use - especially over long distances. Each SkyMaster model features high quality BAK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the large SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions For maximum stability and secure optical alignment the 20x80 SkyMaster binoculars feature enhanced structural reinforcement to the main binocular body. As an additional convenience it also includes an integral super rigid photo tripod adapter. The SkyMaster binoculars are built to provide years of magnificent views of the world around you and the heavens above. SkyMaster 20x80 features: * 20x magnification porro prism binocular * Giant 80mm objective lens offers maximum image brightness in low light and long range conditions * Ultra sharp focus across the field of view * Multi-Coated optics for sharp, clear views * Suitable for terrestrial or astronomical viewing * Protective rubber covering for ultra-firm grip * Large center focus knob for easy focusing * Integrated tripod adapter rod for ultra-stable tripod mounting * Long eye relief ideal for eyeglass wearers * Deluxe padded carrying case included for travel and save storage * No Fault Warrany provides best protection and product support on the market * Multi-coated optics * High-quality BaK-4 prisms * Large aperture perfect for low light conditions and stargazing * Diopter adjustment for fine focusing * Long eye relief ideal for eyeglass wearers