The Sky-Watcher 80/600 Evostar ED Doublet Refractor OTA is a refractor telescope that well designed for wide-field astronomical observation of prominent nebulae, star clusters, and galaxies from a dark-sky location. Come with focal ratio f/7.5, it can be used as an astrograph for sky photography or telephoto lens. The Ultra high contrast of this Sky-Watcher ED Refractor allows the subtlest of details to be easily scrutinized under conditions of good seeing. Metallic high-transmission Lens Coatings (MHC)Each air-to-glass lens surface has been coated by Sky-Watcher’s proprietary MHC. An anti-reflection metallic coatings ensure optimum light transmission approaching 99.5%. Light-Baffled Optical SystemsThe objective lens cell of this 80/600 Evostar ED Doublet OTA is light-baffled to reduce stray & unfocused light to insure optimum contrast. The interior of the tube is flat blackened to prevent unfocused internal light reflections from reaching the focal plane. Precision 2” Crayford FocuserThis precision 2″ Crayford Focuser is mechanically ultra-smooth and backlash-free and offers you a fine and ultra-fine focusing adjustment. Tube MaterialsThe optical tube material is rolled steel, powder-coated reflective gloss black with a gold fleck accent. The front and back cells are cast aluminium painted white & black. Telescope Tube Attachment HardwareThe optical tube comes with attachment hardware that allows it to be securely fastened to any Sky-Watcher mount. The quick-release tube rings provided with Evostar ED80 are cast aluminum, painted white. In the Box: ED80 OTA 2″ Diagonal 1.25″ Focuser Adaptor 8×50 Finderscope with Bracket Eyepiece – LET 28mm Tube Ring Attachment to Any Sky-Watcher Mount Piggyback Bracket Optical Design ED Refractor OTA Model Number SWBDED80-OTA Aperture 80mm Focal Length 600mm Eyepieces LET28mm Focuser Diameter 2″ Finder Scope 9 x 50mm Diagonal 2″ 90º Dielectric Diagaonal Highest Practical Power 160x Recommended Usage Advanced Users Tube Dimensions 10cm x 62cm Shipping Weight 8.5kg
