Celestron Skymaster 15x70mm Porro Binoculars (71009)

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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 - espe cially 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 larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions. Specifications Magnification: 15x Objective Lens Diameter: 70mm (2.75") Focal Length of Objective Lens: 279.63mm (11") Angular Field of View: 4.4° Linear Field of View (@1000 yds) / @1000 m): 231 ft (77 m) Exit Pupil: 4.7mm (.18") Eye Relief: 18mm (.71") Close Focus: 43 ft (13 m) Interpupillary Distance (max): 72mm (2.83") Interpupillary Distance (min): 56mm (2.20") Diopter Adjustment Range: -4 to +8 Twilight Factor: 32.4 Relative Brightness: 22.09 Limiting Stellar Magnitude: Ideal: 11.73Moderate: 10.73Poor: 9.73 Lens Coatings: Multi-Coated Prism Glass (Type): BaK-4 Prism Coatings: N/A Weight: 48 oz (1361 g) Environmental Protection: Water Resistant Nitrogen Filled: No Tripod Adaptable: Yes Carrying Case: Nylon Dimensions: 220mm x 110mm x 280mm (8.7" x 4.3" x 11.0") Show more