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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Starlight Instruments 3.0" Adapter for 6" Celestron Refractor Telescopes

by Starlight Instruments
SKU SI-A30-1903-14
$250.00 - $250.00
$250.00
$250.00 - $250.00
$250.00
Price Match Policy!
  • Enables mounting a 3.0" Feather Touch focuser
  • Designed specifically for Celestron C150RGT 6" refractors
  • Unthreaded design uses existing set screws
  • Provides a secure, stable connection for heavy imaging loads
  • Requires no permanent modification to the optical tube
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  • Description
  • FAQ
  • Specifications
  • Warranty

  • Starlight Instruments 3.0" Adapter for 6" Celestron Refractor Telescopes

    This Starlight Instruments adapter provides the precise mechanical interface required to mount a robust 3.0" Feather Touch focuser onto your Celestron C150RGT 6" refractor. It is the essential component for upgrading your telescope's focusing system to the standard required for serious astrophotography, ensuring a rigid, flex-free connection for heavy cameras and accessories.

    A Secure Mount for Your 3.0" Feather Touch Focuser

    Engineered for a perfect fit, this adapter is specifically made for the Celestron C150RGT. The design is unthreaded and attaches to the optical tube using set screws, exactly mirroring the mounting method of the telescope's original stock focuser adapter. This ensures a straightforward installation without any need for drilling, tapping, or permanently modifying your telescope tube.

    By creating a solid mechanical link, this adapter allows you to leverage the full capability of a 3.0" Feather Touch focuser. This upgrade eliminates the image shift and flexure common with stock focusers, providing the stability and precision needed to achieve critical focus with heavy imaging trains.

  • Will this Starlight Instruments adapter fit any 6" refractor?

    No, this adapter is custom-machined specifically for the Celestron C150RGT 6" refractor. It is not a universal part and will not fit other 6" refractors from Celestron or other brands.

    How does this 3.0" adapter attach to the Celestron C150RGT tube?

    The adapter is unthreaded and is designed to be secured by set screws. This method is identical to how the original factory-installed focuser adapter is attached, allowing for a direct, no-modification replacement.

    I want to use a heavy camera on my Celestron 6" refractor. Is this adapter part of the solution?

    Absolutely. This adapter is the critical first step. It allows you to install a Starlight Instruments 3.0" Feather Touch focuser, which is engineered to handle heavy imaging trains without flexure, sag, or image shift, making it an essential upgrade for astrophotography.

    Does this adapter require drilling or tapping new holes in my telescope?

    No. The Starlight Instruments adapter is engineered to be a drop-in replacement. It uses the existing set screw mounting system on the Celestron C150RGT optical tube, preserving your telescope's original condition.

    Which Starlight Instruments focuser is this adapter designed for on my Celestron C150RGT?

    This adapter is specifically made to connect a 3.0" Feather Touch focuser to the Celestron C150RGT optical tube. It will not work with 2.0" or other sizes of Feather Touch focusers.

    Is this Starlight Instruments adapter threaded?

    No, this is an unthreaded adapter ring. Its function is to correctly size the telescope's tube opening to accept the 3.0" Feather Touch focuser, which is then secured in place via set screws.

  • Telescope Compatibility Celestron C150RGT 6" Refractor
    Focuser Compatibility Starlight Instruments 3.0" Feather Touch Focuser
    Attachment Method Unthreaded; secured by set screws
  • Starlight Instruments 2-Year Warranty