Celestron SkyMaster binoculars feature large objective lenses and are specifically designed for astronomical observing. Each SkyMaster model features high quality BAK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions.
The smaller 8x56 and 9x63 models are waterproof and feature a shock-resistant rubber covering, and twist-up eyecups. They also provide superb image quality with BAK-4 prisms and fully multi-coated optics. Their excellent depth of field gives a good overview without the need for constant refocusing.