Celestron 72022 SkyMaster DX 8x56 Binoculars 8x magnification porro prism binocular. Fully Multi-Coated optics for extremely sharp, clear views. Rugged full-size design for maximum image brightness Nitrogen purged for waterproof and fogproof performance Multi position twist-up eyecups for quick adjustment and optimum eye relief Suitable for terrestrial or astronomical viewing Protective rubber covering for ultra-firm grip. Carrying case included for travel and safe storage. Large center focus knob for easy focusing