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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.
Starlight Instruments 3.5" End Cap for Takahashi 72mm Male Threaded Accessories
Starlight Instruments 3.5" End Cap for Takahashi 72mm Male Threaded Accessories

Starlight Instruments 3.5" End Cap for Takahashi 72mm Male Threaded Accessories

by Starlight Instruments
SKU SI-EC35-505-72
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
Price Match Policy!
  • Adapts 3.5" Feather Touch focusers to accept Takahashi accessories
  • Provides a female 72mm x 1mm threaded interface
  • Ensures a rigid, non-flexing connection for astrophotography
  • Machined from high-grade aluminum for precise alignment
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  • Description
  • FAQ
  • Warranty

  • Starlight Instruments 3.5" End Cap for Takahashi 72mm Male Threaded Accessories

    The Starlight Instruments 3.5" End Cap provides a direct, secure connection for Takahashi accessories by converting the focuser's drawtube to a female 72mm x 1mm thread. This precision-machined adapter ensures your Takahashi reducer, flattener, or camera rotator aligns perfectly with the optical axis of your 3.5" Feather Touch focuser, eliminating image-degrading tilt.

    A Secure 72mm Threaded Connection for Takahashi Optics

    For serious imaging, a threaded connection is non-negotiable. This end cap replaces the standard compression ring on your 3.5" Feather Touch focuser, creating a rigid, direct-thread attachment point for any Takahashi component that uses a male 72mm x 1mm thread. This design eliminates any possibility of sag or tilt that can occur with slip-fit adapters, ensuring your entire imaging train remains perfectly orthogonal to the focal plane for sharp stars across the field.

  • What is the purpose of the Starlight Instruments 3.5" End Cap for Takahashi 72mm accessories?

    Its primary purpose is to provide a secure, threaded connection between a 3.5" Starlight Instruments Feather Touch focuser and Takahashi accessories, such as field flatteners or reducers, that have a male 72mm x 1mm thread. This is critical for astrophotography to prevent tilt and flexure in the imaging train.

    How does this 72mm End Cap improve on a standard compression ring adapter?

    A threaded connection is far more rigid and secure than a compression ring. For heavy imaging trains, this end cap eliminates the potential for sag, tilt, or rotation, ensuring the camera sensor remains perfectly aligned with the optical axis throughout an exposure.

    Will this Starlight Instruments End Cap fit my Takahashi FSQ-106ED's stock focuser?

    No. This end cap is designed to thread onto the drawtube of a Starlight Instruments 3.5" Feather Touch focuser. It adapts the Starlight focuser to accept Takahashi accessories, not the other way around.

    I have a Takahashi TOA-130 with a Starlight 3.5" focuser. Is this the right part for my Takahashi flattener?

    You must check the specific thread on your flattener. This end cap has a female M72x1 thread. If your Takahashi flattener or reducer has a matching male M72x1 thread for connection, then this adapter is the correct component to attach it to your 3.5" Feather Touch focuser.

    Is installation of this 3.5" End Cap difficult?

    Installation is straightforward. It typically involves unthreading the existing end cap (like a 2" compression ring) from the drawtube of your 3.5" Feather Touch focuser and simply threading this new cap in its place until it is snug.

    Does this Starlight Instruments End Cap allow for collimation or tilt adjustment?

    This is a fixed adapter designed for precise alignment. It does not include collimation screws. It relies on the high machining tolerances of both the Feather Touch focuser and the Takahashi accessory to ensure orthogonality. If you require tilt adjustment, you would need a separate tilt adjuster elsewhere in your imaging train.

  • Starlight Instruments 2-Year Warranty