Celestron 6" Schmidt-Cassegrain OTA with CG-5 Mount Plate

Celestron 6" Schmidt-Cassegrain OTA with CG-5 Mount Plate
Item # CE-91010-XLT
  • The Celestron C6 SCT OTA has an aperture of 6" and features patented Starbright XLT coatings for maximum performance.
  • Visual back allows for use with 1.25" accessories.
  • The Celestron C6-A-XLT Optical Tube Assembly is equipped with a 6x30 finderscope to help accurately find objects.
  • Included star diagonal provides more comfortable viewing position when observing objects that are high in the sky.
  • Celestron 6" Optical Tube Assembly includes dovetail rail compatible with CG-5 and Advanced VX style mounts.


Celestron C6-A-XLT Schmidt Cassegrain Optical Tube Assembly

Celestron Schmidt-Cassegrain Optical Tube Assemblies (OTA) are available individually to be used with your favorite mount. Each OTA is made to the same exacting standards as those used on all their high quality telescopes. All optical surfaces are coated with StarBright XLT coatings. These tube assemblies are equipped with the same dovetail mounting bar as used on the CG-5 series for easy attachment to a variety of popular mounts (see below).

The Celestron C6 Schmidt-Cassegrain features a precision optical system with 1500mm focal length (f/10) and offers 40% more light gathering than a 5” telescope and come standard with Celestron’s StarBright® XLT coatings at no extra cost.

What's more, you have Celestron's guarantee of uncompromising quality backed up with a two year warranty. Celestron warrants your telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship.

Celestron C6-A-XLT Schmidt Cassegrain Optical Tube Assembly Features

  • 1500 mm focal length (f/10).
  • 25 mm eyepiece included (60x).
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings.
  • Visual back allows for use with 1.25" accessories
  • 6x30 finderscope to help accurately find objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Includes dovetail rail compatible with CG-5 Advanced Series mount
Celestron Product Number: 91010-XLT

Please Note: This optical tube assembly will fit on the Celestron CG-5 and Advanced VX mount as well as the Meade LXD55/75, the older style Losmandy GM-8, and some Vixens. It will not attach to mounts that accept a 3" dovetail, such as the CGE, G-11, Paramount, or newer GM-8. If you are unsure, please give us a call before you buy.
Additional Information

Additional Information

SKU CE-91010-XLT
UPC Code 050234101097
Manufacturer Celestron
Telescope Series Celestron Optical Tubes
Optical Design Schmidt-Cassegrain
Mount Type None - Optical Tube Only
Warranty 2 Year Warranty
Telescope Aperture 5.91"
Telescope Focal Ratio f/10
Telescope Focal Length 1500mm
Limiting Stellar Magnitude 13.4
Highest Useful Magnification 354x
Optical Coatings Celestron XLT
Tube Color or Finish Celestron Grey
Optical Tube Outer Diameter Not provided by manufacturer
Length of Optical Tube 16"
Optical Tube Weight 10 lbs.
Mount Weight N/A
Dew Shield Included? No, Sold Separately
Diagonal Included? Yes - 1.25" Star Diagonal
Finder Included 6 x 30 Optical Finder
Eyepiece(s) Included 25mm
Power Adapter Included None - Does Not Require Power
CD ROMs Included None
Counterweights Included N/A
Alignment Procedure N/A
Tracking Modes N/A
Objects in Database N/A
OTA Mount Type CG-5 Dovetail
Tripod Type Included None, Sold Separately
Total Telescope Weight N/A

Customer Reviews 1 item(s)

Wonderful spotting scope
The C6 SCT OTA is a quality product. Many years ago producing an SCT was said to be prohibitively expensive. I remember fliers circulating in either late 1969 or 1970 announcing the Celestron C8 SCT for I believe $795. This was quite a breakthrough in mass production technology at an affordable price.
I purchased this 6 Celestron SCT to be used mainly as a high power spotting scope, a task it performs exceedingly well. This particular unit needed to have its corrector cleaned and while at it, I relined the baffle tubes to reduce stray light to a minimum. Now it excels in powers that other high priced conventional refractor spotting scopes only dream of. Using my binocular viewer the views are superb in the 90x to 360x range- sharp with high contrast and excellent color correction.
By the way, for terrestrial spotting I often use a 90 degree correct image diagonal which is superior optically to the 45 degree version. The included dovetail plate has 1/4x20 threads that allow the OTA to be mated with a HEAVY duty tripod.
This may be the ultimate spotter if you want a scope that can reach farther than even the most highly touted standard spotting scopes.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by H2E / (Posted on 11/7/2009)
Included Items

Included Items

  • Celestron 6" f/10 Aluminum SCT OTA with Starbright XLT Coatings
  • 25mm 1.25" Eyepiece
  • Visual Back
  • 6X30 Finderscope
  • 1.25" diagonal
  • Dovetail Slide Bar for CG-5 Mount
Questions & Answers

Product Questions

Hi, the CG-5 Mount plate of this tube will fit on the ioptron EQ Pro computerized mount? Thanks.
Can I use this tube with the Celestron/Skywatcher All-View mount?Or the tube is too heavy for this mount?Thank you!
What is the magnification of this OTA at prime focus, when using a T-mount and DSLR? I know how to figure magnification when using eyepieces for viewing.


Or the tube is too heavy for this mount?
Can this ota be mounted on a Celestron CG4?
Hi, what mount(s) are compatible with the "CELESTRON 6 SCHMIDT-CASSEGRAIN OTA WITH CG-5 MOUNT PLATE"? Please do not suggest EQ's or computerized mounts. I am just looking for an ALT-AZ mount that has slow-motion control cables.
What is the difference between this OTA and the Celestron NexStar 6SE?
Support / Downloads
Related Blog Posts