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Starlight Instruments 3.0" End Cap for Sky-Watcher Corrector

by Starlight Instruments
SKU SI-EC30-1905-65
$150.00 USD - $150.00 USD
$150.00 USD
$150.00 USD - $150.00 USD
$150.00 USD
Price Match Policy!
  • Connects 3.0" Feather Touch Focusers to Sky-Watcher Correctors
  • Provides a Secure, All-Threaded Connection
  • Eliminates Tilt and Flexure from Compression Rings
  • Precision-Machined for Optimal Optical Spacing
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Starlight Instruments 3.0" End Cap for Sky-Watcher Corrector

    The Starlight Instruments 3.0" End Cap provides a direct, secure threaded connection between a Feather Touch 3.0" focuser and a Sky-Watcher coma or field corrector, eliminating the potential for tilt and flexure common with compression ring adapters. This custom-machined component ensures your entire imaging train remains perfectly rigid and orthogonal to the optical axis, a critical requirement for serious astrophotography.

    A Rigid 3.0" Connection for Serious Imaging

    For astrophotography with heavy cameras and filter wheels, a standard compression ring is a potential point of failure. This 3.0" end cap replaces the standard 2" compression ring on your Feather Touch focuser, creating a solid, threaded junction with your Sky-Watcher corrector. This guarantees your imaging components maintain perfect alignment throughout a long night of exposures.

    Designed for Sky-Watcher Correctors

    This adapter is machined with male M65x1 threads for the Sky-Watcher corrector. It provides a secure, direct attachment to your 3.0" Feather Touch focuser, maintaining the precise optical spacing required for optimal correction. It is the ideal solution for integrating a high-end Feather Touch focuser onto a Sky-Watcher imaging Newtonian or refractor.

  • Which Starlight Instruments focusers is this end cap compatible with?

    This end cap is designed for use with Starlight Instruments' 3.0" Feather Touch focusers, including the FTF3015, FTF3025, and FTF3035 models. It is not compatible with their 2.0", 2.5", or 3.5" focusers.

    Will this Starlight Instruments end cap work with correctors from other brands?

    No. This end cap is machined with threads specifically to match Sky-Watcher correctors. Using it with other brands will likely result in an insecure fit or incorrect optical spacing. Starlight Instruments offers different end caps for other popular corrector models.

    I'm upgrading my Sky-Watcher Esprit refractor with a 3.0" Feather Touch focuser. Is this the right part?

    Only if your Sky-Watcher corrector takes a male M65x1 connection from the focuser side; this end cap is specified only as having male M65x1 threads for a Sky-Watcher corrector. Check your flattener's thread before ordering. It ensures a solid, repeatable connection for your imaging train.

    Why use a threaded end cap instead of the standard 2" compression ring?

    A threaded connection is significantly more rigid and secure, which is critical for astrophotography. It prevents any possibility of the optical train sagging or shifting during an exposure, which can cause elongated stars and ruin subframes. This is especially important with heavier cameras, filter wheels, and off-axis guiders.

    Does installing this end cap require special tools?

    No, installation is straightforward. The end cap screws into place at the end of the focuser drawtube. Most Starlight end caps also have three set screws on the face, adjusted with a 1/16 hex key, for collimation (tilt) adjustment.

  • Focuser Compatibility Starlight Instruments 3.0" Feather Touch Focusers
    Corrector Compatibility Sky-Watcher corrector with M65x1 thread
    Connection Type Threaded
    Corrector-side connection M65x1 Male
    Focuser-side connection 3.0" Feather Touch drawtube

    • 3.0" End Cap for Sky-Watcher Corrector

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  • Starlight Instruments 2-Year Warranty