Celestron Adapter -SCT to 2-inch Visual Back

  • Replace 1.25-inch visual back with this SCT to 2-inch Adapter.
  • Internal threads to match the rear cell of most Schmidt-Cassegrain or Maksutov-Cassegrain telescopes.
  • Brass compression ring. 
  • Use with photo adapters to attach imaging cameras. 
  • Durable, anodized black aluminum housing.


  • Sale
  • Regular price $27.95
  • $23.35
  • You save: $4.60 (16%)

More on the Way in 14 - 28 Business Days

Free Shipping
Add to Wishlist
Already have gear? Trade it in for cash or new equipment.

Accessories Added

OPT Telescope Expert

Want Help?

Ask Our Telescope Experts


Celestron Adapter -SCT to 2-inch Visual Back

An Adapter to replace your 1.25-inch visual back so you can attach directly to standard 2-inch diagonals, eyepieces, and imaging adapters!

This sturdy, high-quality adapter provides a solid connection between your Schmidt-Cassegrain or Maksutov-Cassegrain telescope and 2-inch accessories without any special threaded 2-inch diagonal. This accessory makes it possible for you to maximize the views through your telescope with a standard 2-inch diagonal, eyepiece, and other accessories (like photo adapters) allowing a connection to a camera for astroimaging.


The adapter offers an ultra-secure threaded connection to your telescope. On the other side, a brass compression ring provides a strong grip on eyepieces and other accessories without scratching or denting their barrels. To tighten the ring around the accessory, just adjust the set screw.


With its precision machined aluminum construction and black anodized finish, this adapter will resist corrosion and wear, providing you with years of use. The black interior also reduces the internal light reflections, enhancing your view.

Celestron Adapter -SCT to 2-Inch Visual Back-split diagonal

  • Replace your 1.25-inch visual back with this SCT to 2-inch Adapter and enjoy stunning views through 2-inch eyepieces and other accessories.
  • Internal threads provide a secure connection to the rear cell of most Schmidt-Cassegrain or Maksutov-Cassegrain telescopes.
  • Brass compression ring holds 2-inch eyepieces or diagonals tightly without scratching their barrels.
  • Use with photo adapters to attach imaging cameras to the rear of your Schmidt or Maksutov telescope.
  • Features a durable, anodized black aluminum housing.



Adapter Side A2" thread/ female
Adapter Side B2" Compression/ female
Free ShippingYes
Weight3.9 ounces (112 g)


  • Celestron Adapter -SCT to 2-inch Visual Back 
Customer Reviews
4.7 Based on 3 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Lee M.
United States United States
Nothing fancy, get's the job done

Bought for adapting my 2" Hotech centering T-Adapter. Works great, solid construction. Good secure locking wedge too, for those that don't use the Hotech centering adapters.

United States United States
Perfect transaction

Fit perfectly with my Celestron and 2" attachments. Delivered ahead of schedule.

United States United States
Great... but only for newer C8s

This adapter is very nicely made... but it will NOT thread onto older (late '70s) C8s. No currently-made adapter will.