SkyWatcher SWBDED80-OTA 80mm - 600mm ED Doublet Black Diamond

The Black Diamond ED80 Doublet Refractor OTA from Sky-Watcher features a doublet apochromatic lens system with Extra-low Dispersion (ED) glass and Sky-Watcher's proprietary photon anti-rejection Metallic High-Transmission Coatings (MHC) on all air-to-glass optical surfaces. This combination of glass, lenses, and coatings virtually eliminates chromatic aberrations for clear and bright high-contrast images with true color rendition. This is a versatile optical tube assembly (OTA) that is well suited for wide-field astronomical observation of prominent nebulae, star clusters and galaxies, or can be used as an astrograph for sky photography, a terrestrial spotting scope or telephoto lens. A mounting cradle-ring clamps over OTA and allows the user to adjust the orientation and position of the scope relative to the mount to optimize viewing comfort and balance, while avoiding interference with other equipment. The scope is offered without a mount or tripod, but a Vixen-style dovetail plate makes it compatible with any alt-az or equatorial mount with a Vixen-style saddle. Its two-speed Crayford-style focuser helps make fine-focusing fast and precise without backlash. The ProED comes with several accessories to help you get observing faster and easier. First, are two long eye relief eyepieces that produce 30 and 120x magnification, a 90° star diagonal for more comfortable viewing, and a large 8x50 erect-image finderscope to make finding your celestial objects faster and easier. Finally, Sky-Watcher provides a foam-lined aluminum carrying case to safely store and transport the OTA. Optical Performance 80mm objective lens 600mm focal length Focal ratio: f/7.5 Refractor-style optical design Extra-low Dispersion (ED) glass Apochromatic doublet lenses eliminate chromatic aberrations for true color rendition and enhanced contrast Proprietary anti-reflection Metallic High-Transmission Coatings (MHC) multicoatings on all optics Bbjective lens cell is light-baffled to reject stray, unfocused light Baffled draw tube for enhanced contrast OTA interior is flat blackened to help prevent unfocused internal light reflections from reaching the focal plane Resolution, Rayleigh: 1.74 arc sec Resolution, Dawes: 1.45 arc sec Focuser 2" diameter focuser Dual-speed Crayford-style Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash Includes 1.25" adapter for using smaller eyepieces and accessories Included Accessories Diagonal: 90° angle Dielectric coatings for greater than 99% reflectivity Star diagonal corrects images vertically, but not horizontally 8x50 erect-image finder scope with bracket Mount User-supplied mount and tripod required Vixen-style dovetail plate included Compatible with any alt-az or equatorial mount with a Vixen-style saddle Cradle-ring assembly for plate allows the scope orientation to be changed based on mount configuration Integrated 1/4"-20 piggy-back camera mount for wide-field astro photography Quick-release system for fast setup and breakdown    MPN - SWBDED80-OTA GTIN - N/A