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. SkyMaster models feature 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 features of the SkyMaster DX series include: fully multi-coated optics for extremely sharp, clear views, rugged full-size design for maximum image brightness, nitrogen purged and sealed for weatherproof 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 a firm grip, large centre focus knob for easy focusing, carrying case included for travel and safe storage, Limited Lifetime Warranty provides best protection and product support on the market , ,- Optical Design: Porro ,- Magnification: 8x ,- Objective Lens Diameter: 56mm ,- Angular Field Of View: 5.8° ,- Linear Field Of View (@1000Yds): 304 Ft (94m) ,- Near Focus: 25 Ft (7.62m) ,- Prisms: Bak4 ,- Tripod Adaptable: Yes ,- Weight: 1077g