Celestron SkyMaster 20x80mm Porro Prism Binoculars Black. Celestron 20 x 80 Skymaster Binocular 71018 also a great choice for terrestrial use especially over long distances. Celestron 20 x 80 mm Binos 71018 feature high quality BAK-4 prisms and have multi-coatings for enhanced contrast. Celestron has designed and engineered the larger Celestron SkyMaster Binocular models to meet the special demands of extended astronomical or terrestrial viewing sessions. For maximum stability and secure optical alignment Celestron 20 x 80 SkyMaster Binoculars 71018 feature enhanced structural reinforcement to the main binocular body. As an additional convenience Celestron 20x 80mm Sky Master Binocular also includes an integral super rigid photo tripod adapter. 20 x 80 mm Celestron SkyMaster Series Binoculars are built to provide years of magnificent views of the world around you and the heavens above. Specifications for Celestron SkyMaster 20x80mm Porro Prism Binoculars: Manufacturer: Celestron Color: Black Magnification: 20 x Objective Lens Diameter: 80 mm Prism System: Porro Prism Material: BAK4 Eye Relief: 17 mm Exit Pupil: 4 mm Field of View Linear: 168 ft at 1000 yds Field of View Angle: 3.7 degrees Optical Coating: Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 40 Interpupillary Distance: 72 mm Close Focus: 80 ft Diopter Adjustment Range: -4 - 8 dpt Weather Resistance: Yes Water Resistance Level: Water Resistant Length: 9 in Weight: 75 oz Condition: New Package Type: Box Included Accessories: Instruction Manual Rainguard Objective Lens Cap Lens Cloth Case Neck Strap Carrying Case Magnification Type: Fixed Width: 4.7 in Tripod Adaptable: Yes Fogproof: No Case: Yes Nitrogen Filled: No Height: 12.8 in Brightness Index: 16 Armoring: Rubber Armored Features of Celestron SkyMaster 20x 80mm Binocular 71018: Water Resistant Multi-coated optics High quality BAK-4 prisms Large aperture perfect for low light conditions and stargazing Integrated tripod adapter rod Long eye relief ideal for eyeglass wearers Diopter adjustment for fine focusing No-Fault Lifetime Warranty Package Contents: Celestron 20x80 Skymaster Binocular 71018 Deluxe padded soft carrying case In addition to Celestron 20x80mm SkyMaster Binoculars 71018 make sure to check out all the other Celestron Binoculars and other Celestron products offered in our store.