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Starlight Instruments 3.0" Adapter PTFE Coupled Collar
The Starlight Instruments 3.0" Adapter PTFE Coupled Collar provides a secure, threaded connection between any FTF30xx series 3.0" Feather Touch focuser and a telescope backplate requiring a 109x1mm male thread. This component is essential for creating a rigid, stable imaging train, eliminating the flexure and tilt that can compromise long-exposure astrophotography.
A Precision 109x1mm Interface for 3.0" Feather Touch Focusers
This adapter is engineered to mount a Starlight Instruments FTF30xx 3.0" Feather Touch focuser directly to a telescope's optical tube assembly. It features a 109x1mm male thread, ensuring a zero-flexure connection that is critical for astrophotography with heavy cameras and filter wheels.
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Direct Telescope Integration: Replaces a stock focuser or visual back on telescopes equipped with a female 109x1mm threaded port, enabling a significant upgrade to a 3.0" Feather Touch system.
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Heavy Payload Support: Creates a solid, all-threaded connection from the telescope to the focuser, eliminating the potential for sag or tilt common with slip-fit or compression ring adapters.
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Full Rotational Freedom: The coupled collar design works seamlessly with the FTF30xx focuser's rotational mechanism, allowing you to orient your entire imaging train 360° for perfect framing without losing focus.
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What is the purpose of the Starlight Instruments 3.0" Adapter PTFE Coupled Collar?
This adapter allows you to attach a Starlight Instruments 3.0" Feather Touch focuser (from the FTF30xx series) to a telescope that has a female 109x1mm threaded connection on its rear cell or optical tube. It creates a secure, rigid mounting point for a high-end focuser upgrade.
Which focusers are compatible with the 3.0" Adapter PTFE?
This adapter is designed specifically for the Starlight Instruments FTF30xx series of 3.0" Feather Touch focusers. It will not work with 2.0", 2.5", or 3.5" models.
What does "Coupled Collar" mean for this Starlight Instruments adapter?
The "Coupled Collar" design means the adapter is made to work with the 3.0" Feather Touch focuser's built-in rotation mechanism. After installation, you can loosen the three gold thumbscrews on the PTFE-lined adapter, rotate the focuser and camera to the desired angle, and re-tighten them.
Will using the 3.0" Adapter PTFE prevent flexure when imaging with a heavy camera on my refractor?
Absolutely. By creating a direct, threaded connection between the telescope tube and the 3.0" Feather Touch focuser, this adapter provides a much more rigid and stable platform than standard compression or slip-fit adapters. This is essential for preventing tilt with heavy imaging payloads.
How do I install the Starlight Instruments 3.0" Adapter PTFE?
Installation involves unthreading your telescope's stock focuser or visual back, then carefully threading the 109x1mm male end of this adapter onto the telescope's rear cell until it is firmly seated. The 3.0" Feather Touch focuser then goes into the adapter and is locked by the adapter's three gold thumbscrews.
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| Focuser Compatibility |
Starlight Instruments 3.0" FTF30xx Series |
| Telescope-Side Thread |
109x1mm Male |
| Adapter Type |
Coupled Collar for Focuser Rotation |
| Kind |
PTFE coupled tube adapter ring |
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3.0" Adapter PTFE Coupled Collar
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Starlight Instruments 2-Year Warranty
