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Starlight Instruments 2.0" Adapter for Celestron & Meade Small Thread SCT Telescopes

Starlight Instruments 2.0" Adapter for Celestron & Meade Small Thread SCT Telescopes

by Starlight Instruments
SKU SI-A20-215
CA$140.00 - CA$140.00
CA$140.00
CA$140.00 - CA$140.00
CA$140.00
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  • Connects Starlight Instruments FTF2015BCR focusers to select SCTs
  • Fits Celestron 8", CPC 800, 9.25", and CPC 9.25 models
  • Also fits the Meade 8" SCT, Meade 7" Maksutov and Sky-Watcher 180mm Maksutov-Cassegrain (2016 and later OTA, black body)
  • Designed for the standard small rear cell thread
  • Enables precise, zero-shift external focusing
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Starlight Instruments 2.0" Adapter for Celestron & Meade Small Thread SCT Telescopes

    This Starlight Instruments 2.0" Adapter is the essential component for upgrading your Schmidt-Cassegrain telescope with the acclaimed FTF2015BCR Feather Touch focuser. Machined for a perfect fit, it allows you to replace the original mirror-based focusing mechanism on Celestron 8" and 9.25" or Meade 8" SCTs. By enabling an external Crayford-style focuser, this adapter completely eliminates the image shift and mirror flop that plague stock SCTs, providing the stability required for critical high-magnification visual work and astrophotography.

    Enable a 2.0" Feather Touch Focuser on Your SCT

    The primary purpose of this adapter is to unlock the legendary focusing accuracy of a Starlight Instruments Feather Touch focuser for your SCT. It securely threads onto the rear cell, providing a rigid mounting point for the FTF2015BCR focuser. This upgrade moves the focusing action from the telescope's primary mirror to an external, high-precision drawtube, fundamentally solving the root cause of image shift.

    • Zero Image Shift: By bypassing the telescope's internal focus mechanism, your target remains perfectly stationary on the sensor or in the eyepiece as you focus.
    • Dual-Speed Control: Gain access to the Feather Touch's 10:1 fine-focus knob for making minute adjustments essential for planetary imaging and splitting tight double stars.
    • Increased Load Capacity: Support heavier cameras, filter wheels, and eyepieces with the robust build of a Feather Touch focuser, without stressing the stock components.

    Precision Fit for 8" and 9.25" Small-Thread SCTs

    This adapter is specifically engineered for Schmidt-Cassegrain telescopes that use the smaller, 2-inch diameter rear cell thread. It is not compatible with larger 3.25" or 3.28" threaded models like the C11 or C14. The precise threading ensures a secure, non-flexing connection between your telescope and the new focuser, maintaining perfect optical alignment.

    Compatible Celestron Models:
    Celestron 8" SCT, Celestron C9.25 SCT, CPC 800, CPC 925

    Compatible Meade Models:
    Meade 8" SCT

    The End of Image Shift: Stock Focuser vs. Feather Touch Control

    An SCT's stock focuser works by moving the entire primary mirror forward and back. This design often introduces "image shift," a frustrating wobble or jump in the field of view, and "mirror flop," a sudden tilt of the mirror when crossing the meridian. For an imager, this makes achieving critical focus nearly impossible.

    This adapter, paired with an FTF2015BCR focuser, remedies the issue entirely. The new focuser moves only the eyepiece or camera along the optical axis, while the primary mirror remains locked in place. The result is perfectly smooth, repeatable, and stable focusing, transforming your SCT into a serious imaging instrument.

  • What is the main benefit of using this Starlight Instruments adapter on my SCT?

    The primary benefit is the complete elimination of image shift and mirror flop. By allowing you to install an external Feather Touch focuser like the FTF2015BCR, you bypass the telescope's internal mechanism that moves the primary mirror. This results in ultra-precise, stable focusing essential for astrophotography and high-power planetary viewing.

    Which specific Starlight Instruments focuser does this adapter fit?

    This adapter is designed to connect the Starlight Instruments FTF2015BCR 2.0" Feather Touch Crayford Focuser to the rear cell of compatible Celestron and Meade SCTs.

    Will this adapter fit my Celestron C11 or C14 telescope?

    No. This adapter is for the "small thread" SCT rear cell found on 8" and 9.25" models. Larger telescopes like the Celestron C11 and C14 use a larger 3.25" or 3.28" thread and require a different adapter from Starlight Instruments.

    How does installing the FTF2015BCR with this adapter improve focusing on Jupiter with my C9.25?

    When observing planets like Jupiter at high magnification, even the slightest focus error can blur details like the Great Red Spot or subtle cloud bands. The stock focuser's image shift makes fine adjustments difficult. With this adapter and a Feather Touch focuser, you can use the 10:1 fine-focus knob to dial in perfect sharpness without the image jumping, allowing you to see the maximum detail your C9.25's optics can resolve.

    Is installation of this Starlight Instruments adapter difficult?

    Installation is straightforward for most users. It typically involves unthreading the stock visual back or diagonal from your telescope's rear cell and carefully threading this adapter in its place. The Feather Touch focuser then attaches to the adapter. Always refer to the focuser's instruction manual for complete details.

    Does this adapter work with Meade's larger 10" or 12" SCTs?

    No, this specific adapter is listed as compatible with the Meade 8" SCT model. Larger Meade SCTs often use a different rear cell thread size and would require a different adapter to mount a Feather Touch focuser.

  • Compatible Focuser Starlight Instruments FTF2015BCR 2.0" Feather Touch
    Telescope Connection SCT Small Rear Cell Thread (2" diameter)
    Compatible Celestron Models 8" SCT, 9.25" SCT, CPC 800, CPC 925
    Compatible Meade Models 8" SCT, 7" Maksutov
    Kind Tube adapter
    Telescope-side connection 2"-24 tpi SCT thread
    Length with FTF2015BCR 76.2 mm racked in, 116.84 mm racked out

    • Starlight Instruments 2.0" Adapter for Small Thread SCTs

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  • Starlight Instruments 2-Year Warranty