Celestron SkyMaster 20x80 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. Additional 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 Limited Lifetime Warranty provides best protection and product support on the market Technical 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 Prism Coatings: N/A Weight: 75 oz (2126 g) Environmental Protection: Water Resistant Nitrogen Filled: No Tripod Adaptable: Yes Carrying Case: Nylon Dimensions: 228mm x 120mm x 325mm (9.0" x 4.7" x 12.8") Included Items: Objective lens capsRainguardCarrying caseNeck strapLens clothInstruction manual In the Box Celestron SkyMaster 20x80 Objective lens caps Rainguard Carrying case Neck strap Lens cloth Instruction manual Warranty & Manuals Limited Lifetime Warranty
