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Starlight Instruments 2.0" Adapter for Orion, Celestron, Sky-Watcher Vixen & Synta Telescopes
This Starlight Instruments tube adapter provides the precise mechanical connection needed to upgrade specific refractors with a 2.0" Feather Touch focuser. It is engineered for optical tubes that require a non-threaded adapter with a 3.804" outer diameter and a 4.0" length, such as the popular Orion 80 ED and 100 ED models.
A 3.804" Adapter for 2.0" Feather Touch Focusers
Upgrading your telescope's stock focuser to a Starlight Instruments Feather Touch is one of the most significant improvements you can make for imaging and critical visual work. This adapter makes that upgrade possible for a range of telescopes built by Synta, including models branded by Orion, Sky-Watcher, Celestron, and Vixen. By matching the telescope's 3.804" mounting diameter, it allows a direct, secure installation of a 2.0" Feather Touch, eliminating the image shift and flexure common in factory-supplied focusers.
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What is the purpose of this Starlight Instruments 2.0" Adapter?
This adapter is a custom-machined part that allows you to replace the original factory focuser on certain telescopes (like the Orion 80 ED) with a high-precision 2.0" Starlight Instruments Feather Touch focuser. It bridges the mechanical difference between the telescope tube and the focuser base.
How do I confirm if this 3.804" adapter fits my telescope?
The most reliable way is to physically measure the flange or opening on your telescope's optical tube where the current focuser is attached. If that diameter is 3.804 inches (approximately 96.6mm), this adapter is the correct choice. It is specifically listed as fitting the Orion 80 ED and 100 ED refractors.
Why upgrade the stock focuser on my Orion 80ED with this adapter and a Feather Touch?
While the Orion 80ED is a capable optical system, its stock focuser can be a weak point, especially for astrophotography. Upgrading to a Feather Touch focuser provides:
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Zero image shift: Critical for achieving sharp focus with a camera.
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Higher load capacity: Securely holds heavy cameras, filter wheels, and eyepieces without slipping or flexing.
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Fine focus control: The dual-speed mechanism allows for extremely precise focus adjustments that are impossible with most stock focusers.
Is this Starlight Instruments adapter threaded?
No. The source data confirms this is a non-threaded adapter. It is designed to slip into the optical tube and be secured by set screws, which is the standard mounting method for many Synta-manufactured refractors.
Will this adapter work with a 2.5" or 3.0" Feather Touch focuser?
No, this adapter is specifically designed to mount a 2.0" Feather Touch focuser. Starlight Instruments makes different adapters for their larger focuser models.
Does installing this adapter on a Sky-Watcher telescope require drilling?
This adapter is designed to be a direct fit for compatible models, utilizing the telescope's existing mounting holes. No permanent modification or drilling of the optical tube should be necessary for a standard installation.
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| Focuser Compatibility |
Starlight Instruments 2.0" Feather Touch |
| Adapter Outer Diameter |
3.804" |
| Adapter Length |
4.0" |
| Mounting Type |
Non-threaded |
| Known Compatible Telescopes |
Orion 80 ED, Orion 100 ED, and other Synta-manufactured telescopes |
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Starlight Instruments 2-Year Warranty
