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Orion Telescopes
Orion 180mm Maksutov-Cassegrain Telescope Optical Tube
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  • Superb moderate and high-power optical performance in a remarkably compact telescope design
  • Whopping 7.1" aperture and 2,700mm focal length (f/15) Maksutov-Cassegrain excels for high-power solar system viewing and photography of the Moon and planets
  • Now comes with 2" visual back and 2"-to-1.25" adapter, so you can use 2" or 1.25" accessories!
  • Boasts enough aperture to provide bright, highly resolved views of smaller deep-sky objects such as planetary nebulas and globular star clusters
  • Only 22" long and weighs less than 16 lbs., for compact portability and easy storage

Learn more
Item #  09969b

Looking for something to satisfy your appetite for power? Try a big Mak! For the most demanding enthusiast, our Orion 180mm Maksutov-Cassegrain Telescope sets a new standard for superb high-power performance in a remarkably compact design. With 7" of aperture and that long focal length that Maksutov aficionados love, you'll get tack-sharp, high-contrast views and spectacular photographs brimming with subtle detail.

We have upgraded the Orion 180mm Maksutov-Cassegrain with a 2" visual back, so now it accommodates a 2" diagonal and 2" eyepieces (it previously came equipped with just a 1.25" visual back)! What's more, the threads on which the 2" visual back attach are SCT (Schmidt-Cassegrain telescope) threads, which are 2" diameter x 24 TPI male threads. So you can remove the visual back to thread on an optional SCT-specific diagonal or camera adapters designed for SCT threads. Along with the 2" visual back we include a 2" to-1.25" step down adapter to allow use of 1.25" accessories, if desired.

The Orion 180mm Maksutov-Cassegrain (7.1") Maksutov-Cassegrain Telescope optical system has a 2700mm focal length (f/15). With 44% greater light grasp than a 150mm Mak, you'll get brighter images and better resolution. No other optical design can deliver such potent optical specifications in a package that measures just 22" long and weighs in at less than 16 lbs. The meniscus lens is fully multicoated for maximum light transmission, further enhancing image brightness. A large rubber-covered focusing knob on the rear sell moves the primary mirror incrementally to enable precise, sharp focus. A dovetail finder base on the rear cell accepts any Orion finder scope or EZ Finder. The Vixen-style aluminum dovetail rail on the underside of the tube provides a solid connection to any compatible mount.

Our biggest Mak offers the amazing image definition Maks are known for, but with a hefty 7" of aperture for brighter images. Whether your passion is visual astronomy or high-power solar system imaging, the newly upgraded Orion 180mm Maksutov-Cassegrain will up your game to the next level of awesomeness!


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
  • Best for viewing
    Brighter deep sky
  • Best for imaging
    Lunar & planetary
  • User level
  • Optical design
  • Optical diameter
  • Focal length
  • Focal ratio
  • Eyepieces
  • Resolving power
  • Lowest useful magnification
  • Highest useful magnification
  • Highest theoretical magnification
  • Limiting stellar magnitude
  • Optical quality
    Diffraction limited
  • Focuser
  • Secondary mirror obstruction
  • Secondary mirror obstruction by diameter
  • Secondary mirror obstruction by area
  • Mirror coatings/over-coatings
    Magnesium Fluoride
  • Mount type
    Optical Tube without Mount
  • Astro-imaging capability
    Lunar, planetary & long exposure
  • Tube material
  • Length of optical tube
    22.5 in.
  • Weight, optical tube
    15.9 lbs.
  • Weight, fully assembled
    15.9 lbs.
  • Additional included accessories
    Included accessories may vary for 2nds, Substitutions may be made
  • Other features
    Dovetail bracket for finder scope, Dovetail mounting plate, 2" visual back with 1.25" adapter; SCT threads
  • Warranty
    One year

Orion 180mm Maksutov-Cassegrain telescope optical tube assembly
2" visual back with 1.25" adapter
Dovetail mounting rail
Dovetail finder scope base
Dust cap

Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

A per-item shipping charge (in addition to the standard shipping and handling charge) applies to this product due to its size and weight. This charge varies based on the shipping method.

Standard Delivery: $0.00
Standard Delivery to Canada: $25.00
3 Day Delivery: $55.00
2 Day Delivery: $55.00
Next Day Delivery: $68.00

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