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Starlight Instruments 3.5" Adapter for Takahashi TOA 150 Telescopes
Starlight Instruments 3.5" Adapter for Takahashi TOA 150 Telescopes
Starlight Instruments 3.5" Adapter for Takahashi TOA 150 Telescopes
Starlight Instruments 3.5" Adapter for Takahashi TOA 150 Telescopes
Starlight Instruments 3.5" Adapter for Takahashi TOA 150 Telescopes

Starlight Instruments 3.5" Adapter for Takahashi TOA 150 Telescopes

by Starlight Instruments
SKU SI-A35-503-TOA150
CA$378.00 - CA$378.00
CA$378.00
CA$378.00 - CA$378.00
CA$378.00
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  • Adapts 3.5" Feather Touch Focusers to Takahashi TOA-150 Telescopes
  • Precision-Machined from High-Quality Aluminum
  • Ensures a Rigid, No-Flex Connection for Astrophotography
  • Features Starlight Instruments' Signature Anodized Finish
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  • Description
  • FAQ
  • Warranty

  • Starlight Instruments 3.5" Adapter for Takahashi TOA 150 Telescopes

    This Starlight Instruments adapter ring creates the critical mechanical link to replace the stock 4.0" focuser on your Takahashi TOA-150 telescope with the precision of a 3.5" Feather Touch focuser, ensuring a rigid, zero-flex connection for any imaging train.

    A Seamless Upgrade Path for Your Takahashi TOA-150

    This adapter is engineered specifically for the Takahashi TOA-150, enabling a direct upgrade to the Starlight Instruments 3.5" Feather Touch focuser. By replacing the stock focuser, you gain the ultra-fine control, high load capacity, and zero image-shift that are essential for critical astrophotography and visual observation.

    Machined from the highest quality aluminum and finished in-house at Starlight Instruments, this adapter ring is not just a spacer but a structural component. It guarantees that your heavy camera, filter wheel, and other accessories are held with absolute rigidity, preserving the optical precision of your TOA-150.

    Why a 3.5" Focuser Replaces the Stock 4.0" Unit

    It may seem counterintuitive to replace a 4.0" focuser with a 3.5" model, but the specifications refer to different dimensions. The 4.0" measurement of the stock Takahashi focuser is its outside diameter, whereas the 3.5" measurement of the Feather Touch focuser is its clear internal diameter.

    This means the Feather Touch actually has a larger clear aperture, preventing any vignetting of the light cone from the TOA-150's optics. This adapter correctly mates these two components, ensuring you get the maximum performance benefit from your focuser upgrade without compromising light throughput.

  • What is the purpose of this Starlight Instruments adapter for the Takahashi TOA-150?

    This adapter serves as the mechanical interface to securely mount a Starlight Instruments 3.5" Feather Touch focuser onto a Takahashi TOA-150 telescope, replacing the original factory focuser. It ensures a precise, rigid fit between these two specific components.

    Is installing this TOA-150 adapter a difficult process?

    Installation is straightforward for users comfortable with basic telescope hardware adjustments. The adapter is designed to thread or bolt directly onto the TOA-150's rear cell, and the Feather Touch focuser then attaches to the adapter. No permanent modifications to the telescope are required.

    Will this adapter cause vignetting with my 3.5" Feather Touch focuser on the TOA-150?

    No. The adapter is designed to maintain the full, unobstructed light path. The 3.5" clear aperture of the Feather Touch focuser is larger than the internal diameter of the stock unit, ensuring that the adapter does not introduce any vignetting and can illuminate even large full-frame sensors.

    Why does this adapter fit a 3.5" focuser when my Takahashi TOA-150 has a 4.0" stock focuser?

    This is a common point of confusion. The 4.0" Takahashi measurement is the outer diameter of the stock focuser assembly. The 3.5" Starlight Instruments measurement is the inner clear aperture. The Feather Touch focuser actually provides a larger clear opening for the light path than the original.

    Is the Starlight Instruments TOA-150 adapter compatible with other Takahashi telescopes?

    No, this adapter is specifically machined for the thread pattern and dimensions of the Takahashi TOA-150 optical tube. Using it on other models, even other Takahashi refractors, is not recommended and will likely not result in a secure or correctly spaced connection.

    What material is the Starlight Instruments TOA-150 adapter made from?

    The adapter is machined from high-quality aluminum. It is then anodized with Starlight Instruments' signature finish for durability, resistance to corrosion, and a seamless aesthetic match with the Feather Touch focuser.

  • Starlight Instruments 2-Year Warranty