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Starlight Instruments 3.0" End Cap for Takahashi M72X1 Male Threaded Accessories

Starlight Instruments 3.0" End Cap for Takahashi M72X1 Male Threaded Accessories

by Starlight Instruments
SKU SI-EC30-1905-72
CA$210.00 - CA$210.00
CA$210.00
CA$210.00 - CA$210.00
CA$210.00
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  • Adapts 3.0" Feather Touch focusers to Takahashi accessories
  • Provides a male M72x1 threaded connection
  • Ensures a rigid, non-flexing imaging train
  • Features three screws for precise collimation (tilt) adjustment
  • Machined from black anodized aluminum for durability
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  • Description
  • FAQ
  • Specifications
  • In the Box
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  • Warranty

  • Starlight Instruments 3.0" End Cap for Takahashi M72X1 Male Threaded Accessories

    The Starlight Instruments 3.0" End Cap provides a direct, secure male M72x1 thread for attaching Takahashi flatteners, reducers, and other imaging accessories to your Feather Touch focuser. This component replaces the standard compression-ring end cap, creating a rigid, fully-threaded connection that eliminates the potential for tilt or flexure, which is critical for advanced imaging with heavy cameras and long exposures.

    The M72x1 Thread: A Direct Connection for Takahashi Optics

    For imagers using Takahashi optical accessories, this end cap is the key to integrating them seamlessly with a Starlight Instruments 3.0" Feather Touch focuser. The male M72x1 thread is the standard for many Takahashi components, ensuring a perfect fit without intermediate adapters. By creating a solid metal-on-metal connection, you remove any possibility of sag that can occur with slip-fit or compression ring systems, preserving the optical alignment of your entire imaging train.

    Maintaining Collimation with 3 Adjustment Screws

    A perfectly flat field requires that your camera sensor is perfectly perpendicular to the optical axis. This end cap incorporates three radial set screws that allow for micro-adjustments to the tilt of your attached accessory. This collimation capability is essential for dialing out any sensor tilt, ensuring you can achieve sharp, round stars across the entire frame, especially in fast optical systems.

  • Which Starlight Instruments focusers is the M72x1 end cap compatible with?

    This end cap is designed to fit all Starlight Instruments 3.0" Feather Touch focusers, including the FTF30 series (e.g., FTF3015B-A, FTF3025B-A, FTF3035B-A). It threads directly onto the end of the focuser's drawtube.

    What is the purpose of the three small set screws on this Starlight end cap?

    The three set screws are for collimation and tilt adjustment. They allow you to make minute changes to the angle of the attached accessory relative to the focuser. This is a critical feature for astrophotographers to ensure the camera sensor is perfectly square to the light path, resulting in sharp stars from corner to corner.

    Will this Starlight M72x1 end cap work with the corrector on my Takahashi FSQ-106ED?

    This end cap is designed to connect accessories that have a female M72x1 thread to a 3.0" Feather Touch focuser. You must confirm the specific thread type on your Takahashi FSQ-106ED's corrector or flattener. If it requires a male M72x1 connection, this end cap provides the correct interface.

    Why should I use this threaded M72x1 end cap over the standard 2" compression ring?

    A threaded connection is significantly more rigid than a compression ring. For astrophotography with heavy components like a filter wheel and a cooled camera, this end cap offers superior stability:

    • No Flexure: Prevents the imaging train from sagging under its own weight.
    • No Tilt: Ensures consistent, repeatable alignment every session.
    • Security: Eliminates any risk of valuable equipment slipping out of the focuser.

    How do I install this Starlight Instruments 3.0" End Cap?

    Installation is straightforward. First, unthread and remove the existing end cap (such as the 2" compression ring adapter) from the drawtube of your 3.0" Feather Touch focuser. Then, carefully thread this M72x1 end cap on in its place until it is snug.

    I have a Starlight FTF3015B-A focuser on my custom Newtonian. Will this end cap fit?

    Yes, absolutely. The Starlight Instruments FTF3015B-A is a 3.0" Feather Touch focuser. This end cap will thread directly onto its drawtube, allowing you to connect your Takahashi M72x1 accessories securely.

  • Product Type Focuser End Cap
    Compatibility Starlight Instruments 3.0" Feather Touch Focusers
    Accessory Thread M72x1 Male
    Intended Use Connecting Takahashi Threaded Accessories
    Material Black Anodized Aluminum
    Adjustment 3-Screw Collimation/Tilt Control

    • 3.0" End Cap for Takahashi M72x1 Male Thread

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  • Starlight Instruments 2-Year Warranty