The Orion 8″ f/4 Newtonian Reflector Astrograph was designed for affordable wide field, deep-space imaging performance. It offers 8″ aperture and a fast f/4.0 focal ratio which allows the capture of faint galaxies and nebulas with short photographic exposure times.
The Orion 8″ f/4.0 Newtonian Reflector Astrograph is perfect for intermediate-level astrophotographers, and a great second telescope for more advanced imagers who want more portability. It excels for capturing bright, detailed images with CCD or DSLR cameras. As with any fast Newtonian reflector, an optional coma corrector is recommended to achieve the sharpest images. With an optional eyepiece, this telescope doubles as a fine visual instrument for studying deep-space wonders.
Weighing only 16 lbs. and just 28″ long, this instrument is easily supported on a mid-sized equatorial mount, like the Orion Atlas II EQ-G. The 200mm-aperture parabolic primary mirror is made from low-thermal-expansion BK7 optical glass. Enhanced aluminum mirror coatings with 92% to 95% reflectivity deliver more light to the focuser. A cooling accelerator fan is included on the primary mirror cell for rapid temperature equilibration, to ensure stable images.
The Orion 8″ f/4 Newtonian Reflector Astrograph package includes a machined 2″ dual-speed (10:1) Crayford focuser that incorporates a linear-track bearing. Backfocus distance is 83.2mm from the 2″ collar. Standard accessories include a pair of hinged tube rings, 8×50 finder scope, 2″ extension adapter for visual use, and a quick-collimation cap.
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