Celestron’s SkyMaster Binoculars are large-aperture offerings, ideal for astronomy and long-range terrestrial viewing. The tripod adapter on the 20×80 model provides essential support and increased stability, as these binoculars are not designed for handheld use. Take them to a location with dark skies, mount them on a tripod, and be amazed by their ability to penetrate the darkness, revealing the subtle details of galaxies and nebulae with the advantage of using both eyes.FeaturesOptical PerformanceMagnification and Aperture: 20x magnification with giant 80mm objective lenses, providing maximum image brightness in low-light conditions.Prism Type: Equipped with BaK-4 prisms, which enhance image clarity and provide a wide field of view.Lens Coatings: Multi-coated optics for sharp, clear views with reduced reflections.Angular Field of View: 3.7°, offering a broad perspective of the sky or landscape.Linear Field of View: 195 ft at 1000 yards (65 m at 1000 m), ideal for observing large areas.Viewing ExperienceEye Relief: 18mm, making them suitable for eyeglass wearers.Close Focus Distance: 108 ft (33 m), suitable for observing distant objects.Diopter Adjustment Range: -4 to 8, allowing precise focus adjustments.Durability and ProtectionHousing: Durable rubber-armored housing provides a secure grip and protects against impacts.Environmental Protection: Water-resistant design withstands harsh weather conditions.Mounting and AccessoriesTripod Adaptable: Integrated tripod adapter for stable viewing, essential for high magnification.Carrying Case: Nylon carrying case included for safe storage and travel.Included Items: Objective lens caps, rainguard, neck strap, lens cloth, and instruction manual.SpecificationsGeneralMagnification:20xObjective 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 8Twilight Factor:40Relative Brightness:16Limiting Stellar Magnitude:Ideal: 12.02 | Moderate: 11.02 | Poor: 10.02Lens Coatings:Multi-CoatedPrism Glass (Type):BaK-4Prism Coatings:N/AWeight:75 oz (2126 g)Environmental Protection:Water ResistantNitrogen Filled:NoTripod Adaptable:YesCarrying Case:NylonDimensions:228mm x 120mm x 325mm (9.0″ x 4.7″ x 12.8″)Included Items:Objective lens capsRainguardCarrying caseNeck strapLens clothInstruction manualSolar WarningNever 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.Package Includes1 x Celestron SkyMaster 20x80mm Porro Binoculars1 x Caps1 x Case1 x Strap
