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Celestron Adapter -SCT to 2-inch Visual Back

SKU : CE-93661

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  • 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.


Product Details

  • 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.


  • specifications

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

    • Celestron Adapter -SCT to 2-inch Visual Back 

Product Reviews

Customer Reviews
4.6 Based on 8 Reviews
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Filter Reviews:
    David I.
    United States United States

    Great Adapter for Imaging and Attaching 2-inch Accessories to your SCT

    This adapter threads right onto the back of an SCT telescope and allows you to use 2" accessories such as a 2" diagonal, 2" flip mirror systems, 2" camera adapters or a 2" Barlow lens. I think the 2" adapter is especially important when imaging with CCD / CMOS cameras that have full-frame sensors. In such cases, you would want to use this type of adapter (as opposed to a 1.25 inch adapter) to prevent image cutoff at the sensor's edges.

    Gordon R.
    United States United States

    Works great

    Fits perfect on C-14. Can't ask for more.

    Douglass R.
    United States United States


    Works as required

    United States United States

    New and in box and delivered as promised.

    Great as usual.

    Frank V.
    United States United States

    Not recommended for Celestron 8SE

    With my 2-inch Diagonal (William Optics) it won't allow to slew beyond 80 degrees elevation as it will hit base. Even when mounting telescope as far forward as possible. I can see how this may not be an issue for bases with longer arms like the Evolution, or smaller telescopes like the 6SE. Had to buy something else.

    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.