Established in 1995, Guanghi Optical Instrument Co., Ltd. is a joint stock China astronomy binocular manufactuer and designer engaged in the manufacturing and marketing of a wide variety of Optical Instrument and products. Our products are widely applied in the education of students, research in lab, entertainment and science explore. During more than one decade's development, our products have awarded the CE certificate. We also have our own quality control system and customer' service system. So we can accept the order against customers' samples, specifying designs, specifications, and packaging requirements. We also prepared to accept the OEM and custom astronomical binocular with customer's own trade marks or brand names.

Multi-coated optics
Large aperture perfect for low light conditions and stargazing
Tripod adapter
Long eye relief ideal for eyeglass wearers
Diopter adjustment for fine focusing
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. The 15x70 version is one of the most popular models in the series. It offers serious large aperture light gathering in an affordable and reasonably lightweight configuration. Protective rubber covering for ultra-firm grip Large center focus know for easy focusing Tripod adapter included Long eye relief ideal for eyeglass wearers Carrying case included for travel and safe storage Celestron No Fault Warranty provides best protection and product support on the market Optical Design - Porro Diameter - 70 mm (2.76 in) Magnification - 15x Angular Field Of View - 4.4 degrees Linear Field Of View at 1000 YDS - 230.41 ft (70.23 m) Exit Pupil - 4.7 mm (0.19 in) Eye Relief - 18 mm (0.71 in) Near Focus (Binoculars) - 43 ft (13.11 m) Prisms - BAK-4 Optical Coatings - Multi-Coated Carrying Case - Nylon / Strap - Yes / Caps - Yes Water Resistant Tripod Adaptable - Yes Weight 48 oz (1360.78 g).

Rubber armored and waterproof design
Roof prism with multi-coated lens
Wide-angle 326 foot field of view at 1,000 yards
Magnification: 10x
Objective lens: 25mm
10 Power
90° eyepiece angle makes tripod-mounted observing more comfortable
All-metal body design is built to last. One-year limited warranty
We love binocular stargazing, and our BT70 makes it even more rewarding. It's a true binocular telescope, with optical quality and features you'd expect of a fine astronomical instrument. Air-spaced achromatic lenses, full multi-coatings, and BAK-4 prisms deliver sharp, high-contrast images, and the 90-deg eyepiece angle makes observing more comfortable. Included 20-power eyepieces deliver a 63-deg apparent field of view. 25x or 16x interchangeable eyepieces (Sold Separately) let you vary the magnification for deep-sky, wide-field solar system, and terrestrial viewing - with 3D-like depth of field! Sturdy all-metal body design has retractable lens shades, removable carrying handle, and metal objective lens caps. The 1/4" -20 mounting base attaches to Orion photo tripods. Weighs 8 lbs., 15 oz. One-year limited warranty.

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