Orion CC6 6" f/12 Classical Cassegrain Telescope - 52138

OrionSKU: 52138

Sale price$959 CAD
Only 1 unit left

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  • Classical Cassegrain optical design excels for high-power lunar and planetary observation and imaging
  • Long focal length of 1836mm (f/12) "folded" into an optical tube just 20.5" long - so you won't need a giant mount!
  • The 6" stationary primary mirror - made from thermally stable quartz -- won't exhibit image shift or mirror flop like in a typical Schmidt-Cassegrain or Maksutov.
  • Precision 2" dual-speed (10:1) Crayford focuser with 1.25" adapter.
  • Includes TWO dovetail finder scope bases, a V-style dovetail bar, and three extension rings to allow focus with different visual or imaging combos.

    Get ready for some high-power observation and imaging with our new CC6 6" Classical Cassegrain Telescope! The Classical Cassegrain design hasn't gotten much play among amateur astronomers because they haven't been available except in very large sizes at very high prices. But all that is about to change.

    Our 6" f/12 Classical Cassegrain Telescope excels for high-resolution lunar and planetary viewing and imaging, and will get you in close on tight objects such as globular clusters and planetary nebulas. In a telescope market currently saturated with short-focal-length, wide-field instruments, the CC6 stands apart by offering something for those wanting serious magnifying capability but in a compact form factor. With an optional 10mm eyepiece you're already probing at 183x magnification! There is no pesky chromatic aberration since there are no lenses as in a refractor.

    The Classical Cassegrain optical design utilizes a parabolic primary mirror and a hyperbolic secondary mirror, which for the CC6 allow a long, "folded" focal length of 1836mm to be tucked into a tube just 20.5" long (including focuser). That compact tube, which weighs just 12 lbs., means the CC6 is easily supported on a modest-size mount such as the Orion Sirius EQ-G, even when equipped for photography with an extension ring and optional finder scope and imaging camera.

    Both mirrors are made from quartz, which is more thermally stable than even Pyrex and can take a very fine polish. The enhanced aluminum coating delivers 96% reflectivity, and a quartz overcoat protects the finish. The 6" primary mirror is fixed in place so you won't get image shift or mirror flop like you do from a typical Schmidt-Cassegrain or Maksutov, whose mirrors slide forward and back when focusing. With the CC6, focusing is done with a precision 2" dual-speed (10:1) Crayford focuser machined from solid aluminum. Also unlike a Schmidt-Cassegrain or Maksutov, the CC6 has no glass on the front end to dew up. It's an open tube with eight baffle rings inside to control stray light and ensure maximum contrast.

    Sold as optical tube assembly only, the Orion CC6 6" Classical Cassegrain Telescope comes with TWO dovetail finder scope bases, giving you the freedom to mount an optional Orion finder scope on either side of the focuser, or to mount a small guide scope and finder scope simultaneously. A V-style dovetail mounting bar affixed to the optical tube allows its attachment to any telescope mount equipped with a compatible saddle plate. Also included are three glare-threaded extension rings: one 50mm and two 25mm in length, to allow focus to be achieved with different eyepiece and diagonal combos or imaging cameras. Backfocus distance from the end of the 2" accessory collar is 157.2mm.

    If the idea of a long focal length telescope for high-power visual pursuits or for lunar or planetary photography sounds like fun, get your hands on the Orion CC6 6" Classical Cassegrain Telescope today!


    Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.


    Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

    Product Support

    Visit our product support section for instruction manuals and more

    What's in the Box

    • 6" Classical Cass OTA
    • V-style dovetail mounting bar
    • One 50mm and two 25mm threaded extension rings
    • Dust cover
    • Collimation cap


    • Best for viewing: Lunar & planetary

    • Best for imaging: Lunar & planetary

    • User level: Intermediate

    • Optical design: Reflector

    • Front-end outside tube diameter: 7.25 in.

    • Optical diameter: 152mm

    • Focal length: 1836mm

    • Focal ratio: f/12.0

    • Resolving power: 0.76arc*sec

    • Lowest useful magnification: 22x

    • Highest useful magnification: 300x

    • Highest theoretical magnification: 304x

    • Limiting stellar magnitude: 13.6

    • Optical quality: Diffraction limited

    • Focuser: 2" dual-speed Crayford

    • Secondary mirror obstruction: 58mm

    • Secondary mirror obstruction by diameter: 38%

    • Secondary mirror obstruction by area: 15%

    • Mount type: Optical Tube without Mount

    • Astro-imaging capability; Lunar & planetary

    • Backfocus distance: 157.2mm

    • Tube material: Steel

    • Length of optical tube: 20.5 in.

    • Weight, optical tube: 12.0 lbs.

    • Additional included accessories: One 2" and to 1.25" extension rings, glare threads, Two dovetail finder scope bases, Quick collimation cap

    • Other features: Quartz mirrors with 96% reflectivity, Vixen style dovetail mounting bar, Backfocus distance 157.2mm from 2" collar

    • Warranty: One year

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