Orion 120mm f/5.0 Refractor OTA

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Orion 120mm f/5.0 Refractor OTA
Item # OR-9836
  • The Orion 120mm f/5.0 Refractor OTA is a rich-field refractor optical tube assembly with big 4.7" aperture for deep-sky pursuits and wide-field astrophotography use.
  • 120mm aperture and 600mm focal length refractor provides crisp wide-field views exhibiting high contrast.
  • The Orion 120mm f/5.0 Refractor OTA has a 2" rack and pinion focuser accepts both 2" and 1.25" eyepieces and accessories.
  • Perfectly portable at just 8.6 lbs., makes for a great grab and go telescope!
  • Note: To save shipping delays, this telescope (or mount) will be drop-shipped directly from Orion's warehouse to you.


Orion 120mm f/5.0 Refractor OTA

Are you looking for a refractor telescope body that's short on length and long on light grasp? The the Orion 120mm f/5.0 Refractor OTA is right for you.

This compact, large-aperture Orion 120mm F/5.0 Refractor Telescope Optical Tube is perfect for deep-sky pursuits. Its 120mm (4.7"), multi-coated achromatic telescope lens assembly and modest 600mm focal length combine to provide breathtaking wide-field views. With an optional 25mm Plossl telescope eyepiece, this telescope serves up a sprawling 2.1-deg swath of sky! The fast f/5.0 optical system also makes it an excellent telescope for astrophotography. The 26"-long optical tube is well baffled to ensure good contrast. The cast-metal 2" rack-and-pinion focuser accommodates either a 1.25" or 2" diagonal, so you can use 1.25" or 2" telescope eyepieces. Tube color is gunmetal gray metallic. A mounting base molded into the focuser casting to accept an optional Orion finder scope or EZ Finder II.

For those who already have the amenities like finderscope, eyepieces, mount and tripod - this is a dream come true. You don't pay extra for what you don't need. Perhaps you'd rather customize the way your scope is built from the ground up? Again, the Orion 120mm f/5.0 Refractor OTA is what you're looking for.

This small, high quality refractor is a winner all the way around!

Orion Product Number: 9836

Drop-Ship Policy Note: To expedite your order, this telescope (or mount) will be drop-shipped directly from Orion's warehouse to you and availability will be based on Orion's inventory levels. OPT will contact you immediately if there are any delays on shipment and will provide an estimated lead-time. If the product is not readily available, you will have the option to keep the order open with a 10% deposit. Additional Orion items may be drop-shipped along with the telescope (or mount), or shipped directly from our own OPT stock. Non-Orion items will be shipped directly from the OPT warehouse. As a courtesy, OPT will cover all costs for splitting orders and separate shipments.

If a return issue should arise with an Orion drop-ship item, please note that OPT will be required to issue a minimum 10% restocking fee for its return to Orion. With this exception, all other conditions of the OPT return policy apply. Please feel free to call us at 1-800-483-6287or e-mail us if you have any questions on Orion Drop-Ship product availability or on this policy. We're here to serve you!
Additional Information

Additional Information

SKU OR-9836
Manufacturer Orion
Telescope Series Orion Optical Tube Assemblies
Optical Design Refractor - Achromatic
Mount Type None - Optical Tube Only
Warranty 1 Year Warranty
Telescope Aperture 4.7"
Telescope Focal Length 600mm
Telescope Focal Ratio f/5
Highest Useful Magnification 240x
Limiting Stellar Magnitude 13.1
Optical Coatings Not Provided by Manufacturer
Tube Color or Finish Orion Grey Pearl
OTA Mount Type Not Provided by Manufacturer
Optical Tube Outer Diameter Not provided by manufacturer
Length of Optical Tube 25"
Optical Tube Weight 8.6 lbs.
Mount Weight N/A
Total Telescope Weight 8.6 lbs.
Objects in Database N/A
Alignment Procedure N/A
Tripod Type Included None, Sold Separately
CD ROMs Included None
Eyepiece(s) Included None
Diagonal Included? No - Sold Separately
Dew Shield Included? Yes
Power Adapter Included None - Does Not Require Power
Counterweights Included N/A
Finder Included None

Customer Reviews 1 item(s)

120mm f/5.0 achromat
I'm using this fast achromat for deep sky imaging. I increased the focal length to 750 mm with a 1.5 x barlow and gave a nice image scale to the Dumbell Nebula (M27. The chromatic aberration effects present in achromats could largely be removed in post-processing of the image that I took. The image of M27 I took with this scope is here: http://revans_01420.webs.com/apps/photos/photo?photoid=54917719

Overall I would give this scope 5 stars because of its reasonable price and its potential capabilities. Good deep sky imaging is within reach with this scope, but some post-processing to remove violet halo's etc. will help a lot with an impressive final image.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by revans / (Posted on 10/8/2009)
Included Items

Included Items

  • Optical tube assembly
  • 2" rack & pinion focuser
  • 2" - 1.25" eyepiece adapter
  • Dust cap
  • Starry Night special edition software
Questions & Answers

Product Questions

Can you attach a vixen style dovetail on this for me or fix me up with vixen compatible rings?
Support / Downloads
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