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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 3.0" End Cap - M68x1(F)

Starlight Instruments 3.0" End Cap - M68x1(F)

by Starlight Instruments
SKU SI-EC30-1905-4
$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00
Price Match Policy!
  • Adapts 3.0" Feather Touch focusers to M68x1 female threads
  • Provides a secure, rigid connection for imaging equipment
  • Machined from high-grade aluminum
  • Finished in-house to match Starlight Instruments quality
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Starlight Instruments 3.0" End Cap - M68x1(F)

    The Starlight Instruments 3.0" End Cap provides a direct, female M68x1 threaded connection for your 3.0" Feather Touch focuser, enabling you to build a rigid, tilt-free imaging train with a wide range of popular field flatteners, reducers, and camera adapters.

    Secure M68x1 Threaded Connection for 3.0" Feather Touch Focusers

    This end cap replaces the standard compression ring on a 3.0" Feather Touch focuser, offering a robust threaded interface essential for astrophotography. By creating a solid connection, it eliminates the potential for flexure or tilt that can occur with slip-fit adapters, especially when supporting heavy cameras or filter wheels.

    Machined from a single piece of high-quality aluminum and finished in the Starlight Instruments shop, this adapter maintains the precision and aesthetic of your Feather Touch focuser. It ensures that every component in your optical path meets the same high standard of mechanical integrity.

    • Thread Standard: M68x1 female thread for direct attachment to compatible flatteners, reducers, or off-axis guiders.
    • Focuser Compatibility: Designed exclusively for Starlight Instruments 3.0" and True 3.0" Feather Touch focusers (FTF30xx series).
    • Zero Flexure: A threaded connection is superior to compression rings for preventing any movement in the imaging train, preserving collimation and star shape across the field.

  • What is the Starlight Instruments 3.0" M68x1 End Cap used for?

    This end cap is designed to connect imaging accessories that have a male M68x1 thread directly to a Starlight Instruments 3.0" Feather Touch focuser. It replaces the focuser's standard 2" compression ring end cap to create a more rigid, secure connection for cameras, field flatteners, and reducers.

    Which focusers are compatible with this M68x1 End Cap?

    This end cap is specifically designed for the Starlight Instruments 3.0" and True 3.0" Feather Touch focuser series (models starting with FTF30xx and FTF32xx). It is not compatible with 2.0", 2.5", or 3.5" Feather Touch models.

    How would I use the Starlight Instruments M68x1 End Cap to attach a corrector to my 3.0" Feather Touch focuser?

    You would first unthread the existing end cap from your 3.0" Feather Touch focuser's drawtube. Then, you simply thread this M68x1 End Cap on in its place. This gives you the female M68x1 thread needed to directly attach a corrector, such as certain Riccardi or other brand reducers, ensuring perfect alignment and rigidity in your imaging setup.

    Will this M68x1 End Cap work for connecting my ZWO camera to a 3.0" Feather Touch focuser?

    It depends on your specific adapter chain. Most ZWO cameras use M42 or M54 threads. To use this M68x1 end cap, you would need an additional adapter that steps down from the male M68x1 thread on your flattener or OAG to the required thread on your camera. This end cap provides the secure starting point for building that adapter train.

    Is this Starlight Instruments M68x1 End Cap made of plastic or metal?

    This end cap is machined from high-quality aluminum. Starlight Instruments uses metal for all structural components to ensure maximum rigidity, durability, and a precise fit, eliminating any flexure in the optical train.

    Can I use this M68x1 End Cap on a 2.5" Feather Touch Focuser?

    No, this end cap is not compatible with 2.5" Feather Touch focusers. The drawtube threading is different. You must use an end cap specifically designed for the 2.5" focuser body to ensure a proper and secure fit.

  • Focuser Compatibility Starlight Instruments 3.0" & True 3.0" Feather Touch
    Thread Type M68x1 Female
    Material Aluminum

    • 3.0" End Cap with M68x1 Female Threads

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  • Starlight Instruments 2-Year Warranty