CELESTRON SkyMaster 20X80 Binoculars

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 larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions. Features: - 20x magnification porro prism binocular - Giant 80 mm 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 - Soft carrying case included for travel and safe storage Specifications: - Magnification: 20x - Objective Lens Diameter: 80mm (3.15´´) - Focal Length of Objective Lens: 328.6mm (12.94´´) - Angular Field of View: 3.7° - Linear Field of View (@1000 yds) / @1000 m): 195 ft (65 m) - Exit Pupil: 4mm (.15´´) - Eye Relief: 18mm (.71´´) - Close Focus: 108 ft (33 m) - Interpupillary Distance (max): 72mm (2.83´´) - Interpupillary Distance (min): 56mm (2.20´´) - Diopter Adjustment Range: -4 to +8 - Twilight Factor: 40 - Relative Brightness: 16 - Limiting Stellar Magnitude: Ideal: 12.02 | Moderate: 11.02 | Poor: 10.02 - Lens Coatings: Multi-Coated - Prism Glass (Type): BaK-4 - Weight: 75 oz (2126 g) - Environmental Protection: Water Resistant - Tripod Adaptable: Yes - Carrying Case: Nylon - Dimensions: 228mm x 120mm x 325mm (9.0´´ x 4.7´´ x 12.8´´) Included: - Objective lens caps - Rainguard - Carrying case - Neck strap - Lens cloth - Instruction manual Solar Warning: - Never look directly at the Sun with the naked eye or with this optic. Permanent and irreversible eye damage may result. - Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it. - Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.