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Starlight Instruments 3.0" Adapter for Takahashi TSA120 Telescopes
Starlight Instruments 3.0" Adapter for Takahashi TSA120 Telescopes
Starlight Instruments 3.0" Adapter for Takahashi TSA120 Telescopes

Starlight Instruments 3.0" Adapter for Takahashi TSA120 Telescopes

by Starlight Instruments
SKU SI-A30-1903-31
CA$350.00 - CA$350.00
CA$350.00
CA$350.00 - CA$350.00
CA$350.00
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  • Connects Starlight Instruments 3.0" focusers to Takahashi TSA-120 telescopes
  • Enables use of heavy imaging cameras and accessories
  • Precision-machined for a secure, no-flex connection
  • Replaces the telescope's stock focuser mounting point
  • Provides compatibility for an optional finder scope bracket
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Starlight Instruments 3.0" Adapter for Takahashi TSA120 Telescopes

    This Starlight Instruments 3.0" Adapter provides the specific mechanical interface required to mount a 3.0" Feather Touch focuser onto your Takahashi TSA-120 telescope. It replaces the stock focuser connection, allowing you to leverage the heavy-duty load capacity of a 3.0" rack-and-pinion system for serious astrophotography without image shift or flexure.

    Enable a 3.0" Feather Touch Focuser on Your TSA-120

    The Takahashi TSA-120 is a premium astrograph, and this adapter unlocks its full imaging potential by allowing the installation of a Starlight Instruments 3.0" Feather Touch focuser. This upgrade is critical for astrophotographers using large-format cameras, filter wheels, and off-axis guiders that exceed the capacity of the original focuser.

    • Heavy Payload Support: Provides a rigid, stable platform for a 3.0" focuser, eliminating sag and ensuring your entire imaging train remains perfectly collimated with the optical axis.
    • Automated Focusing: By enabling a Feather Touch focuser, this adapter is the first step toward precise, repeatable automated focusing routines with systems like the Focuser Boss II.

    Precision Fit and Optional Finder Scope Mounting

    Engineered by Starlight Instruments specifically for the TSA-120, this adapter ensures a perfect fit to the telescope's optical tube. The component is machined from high-grade aluminum for durability and a secure, non-marring connection.

    For added convenience during visual use or for mounting a guide scope, this adapter is also compatible with an optional finder scope bracket (sold separately). This maintains the utility of your setup while significantly upgrading its core focusing capabilities.

  • What is the purpose of the Starlight Instruments 3.0" Adapter for the TSA-120?

    This adapter is a required component to replace the stock focuser on a Takahashi TSA-120 telescope with a superior Starlight Instruments 3.0" Feather Touch focuser. It provides the correct mechanical threading and spacing for a secure, direct-fit installation.

    Why should I upgrade the focuser on my Takahashi TSA-120?

    While the stock Takahashi focuser is excellent, upgrading to a 3.0" Feather Touch focuser provides a significant increase in load capacity. This is essential for astrophotography with heavy cameras, filter wheels, and other accessories, preventing flexure and maintaining a perfectly aligned optical train.

    Which Starlight Instruments focuser does this TSA-120 adapter fit?

    This adapter is designed exclusively for Starlight Instruments' 3.0" diameter focusers, such as the FTF3015B-A or FTF3025B-A. It will not work with their 2.0", 2.5", or 3.5" models.

    Is installing the Starlight Instruments TSA-120 adapter difficult?

    Installation involves removing the stock focuser from the rear cell of the TSA-120 and threading this adapter in its place. The 3.0" Feather Touch focuser then attaches to the adapter. While it is a straightforward process for those comfortable with their equipment, it's important to follow instructions carefully to avoid damaging threads.

    Can I still mount a finder scope with this adapter on my TSA-120?

    Yes. The adapter is designed to accept an optional finder scope bracket, which is sold separately. This allows you to retain a finder or mount a small guide scope directly to the focuser base for a solid, integrated setup.

    Does this adapter fit any other Takahashi telescopes besides the TSA-120?

    No, this adapter is machined specifically for the tube and thread pattern of the Takahashi TSA-120 refractor. Using it on other models is not recommended and will likely not result in a secure fit or proper optical spacing.

  • Compatibility Takahashi TSA-120 Telescopes
    Focuser Size Starlight Instruments 3.0" Feather Touch Focusers

    • 3.0" Adapter for Takahashi TSA120

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  • Starlight Instruments 2-Year Warranty