Celestron SkyMaster 25x70mm Porro Prism Binocular Black. The SkyMaster 25x70mm Binocular by Celestron is ideal for astronomical viewing or for terrestrial (land) use especially over long distances. Each Celestron SkyMaster Binocular 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. The Celestron SkyMaster 25x70mm Binocular offers serious large aperture light gathering in an affordable and reasonably lightweight configuration. Specifications for Celestron SkyMaster 25x70mm Porro Prism Binocular: Manufacturer: Celestron Color: Black Magnification: 25 x Objective Lens Diameter: 70 mm Prism System: Porro Prism Material: BAK4 Eye Relief: 13 mm Exit Pupil: 2.8 mm Field of View Linear: 141 ft at 1000 yds Field of View Angle: 2.7 degrees Optical Coating: Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 41.83 Interpupillary Distance: 56 - 72 mm Close Focus: 75 ft Diopter Adjustment Range: -4 - 8 dpt Weather Resistance: Yes Water Resistance Level: Waterproof Weight: 52 oz Condition: New Additional Features: Angular Field of View-2.7 deg Included Accessories: Objective Lens Caps Rainguard Tripod Adapter Instruction Manual Lens Cloth Carrying Case Neck Strap Magnification Type: Fixed Tripod Adaptable: Yes Case: Yes Strap: Yes Armoring: Rubber Armored Features of Celestron Sky Master 25x 70mm Binocular: 25x magnification porro prism binocular Large 70 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 Tripod adapter included Long eye relief ideal for eyeglass wearers Carrying case included for travel and safe storage No Fault Warranty provides best protection and product support on the market Package Contents: Celestron SkyMaster 25x70 Binocular 71008 Celestron SkyMaster 25x70 Porro BaK-4 Prism Water Resistant Binoculars Black - 71008