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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.
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" Adapter for William Optics FLT123 & Megrez 120 Telescopes

Starlight Instruments 3.0" Adapter for William Optics FLT123 & Megrez 120 Telescopes

by Starlight Instruments
SKU SI-A30-1903-WOFLT123
$250.00 - $250.00
$250.00
$250.00 - $250.00
$250.00
Price Match Policy!
  • Connects 3.0" Feather Touch focusers to select William Optics telescopes
  • Custom-designed for the FLT123 and Megrez 120 models
  • Machined from high-quality aluminum for rigidity
  • Provides a secure, no-flexure mounting platform
  • Enables use of heavy imaging cameras and accessories
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Starlight Instruments 3.0" Adapter for William Optics FLT123 & Megrez 120 Telescopes

    This Starlight Instruments adapter creates a rigid, perfectly aligned mechanical connection for a 3.0" Feather Touch focuser. It is specifically machined for the William Optics FLT123 and Megrez 120 refractors, ensuring a seamless, factory-grade fit that eliminates the guesswork from your focuser upgrade.

    A 3.0" Precision-Machined Interface for Feather Touch Focusers

    Upgrading your telescope's stock focuser to a Starlight Instruments Feather Touch is the single most effective way to improve focusing accuracy for astrophotography. This custom adapter is the critical link, providing a solid, flex-free foundation required for heavy cameras, filter wheels, and off-axis guiders. Machined in-house from high-quality aluminum, it guarantees that your focuser is perfectly orthogonal to the optical axis.

    • Solid Mechanical Connection: Replaces the stock focuser attachment point to create a stable, non-shifting platform for a 3.0" Feather Touch focuser.
    • Enables Heavy Payloads: By providing a rigid connection to the optical tube, this adapter allows you to take full advantage of the high load capacity of a Feather Touch focuser.
    • Maintains Optical Alignment: Precision machining ensures that the focuser is mounted without tilt, which is critical for maintaining a flat field with demanding, large-format sensors.

  • Why do I need this specific Starlight Instruments adapter for my William Optics FLT123?

    This adapter is not a generic part; it is custom-machined to match the exact tube curvature and mounting-hole pattern of the William Optics FLT123 and Megrez 120 telescopes. This ensures a perfect fit that maintains optical alignment and provides the rigidity needed for a high-end 3.0" Feather Touch focuser.

    Will this adapter allow me to use a 3.0" Feather Touch focuser on my Megrez 120 for astrophotography?

    Yes, absolutely. This adapter is the essential component for mounting a 3.0" Feather Touch focuser on your Megrez 120. The resulting combination provides the precise, repeatable focus control and high load capacity required for astrophotography with heavy camera systems.

    What is the benefit of upgrading to a 3.0" Starlight Instruments focuser with this adapter?

    A 3.0" Feather Touch focuser offers a larger, unvignetted clear aperture for full-frame sensors, superior load capacity for heavy imaging trains, and the legendary fine-focus control Starlight Instruments is known for. This adapter makes that upgrade possible on your specific William Optics telescope.

    Is this adapter made from the same quality materials as Starlight Instruments focusers?

    Yes. Starlight Instruments machines these adapters in their own shop from the highest quality aluminum and finishes them to the same exacting standards as their world-renowned focusers. This ensures consistent quality and a perfect mechanical match.

    Does this adapter allow the 3.0" focuser to rotate?

    This adapter provides the secure mechanical mounting point for the focuser. The ability to rotate for camera framing is a feature of the Starlight Instruments focuser itself (like the FTF30xxB-A series), which typically rotates within its own housing. This adapter ensures the focuser is mounted securely enough to make that rotation smooth and reliable.

    How does this Starlight Instruments adapter attach to the telescope?

    The adapter is designed to attach directly to the rear cell or optical tube of the William Optics telescope, typically using the same mounting points as the original stock focuser. This provides a direct, rigid connection between the telescope tube and your new Feather Touch focuser.

  • Compatibility William Optics FLT123 & Megrez 120 Telescopes
    Focuser Size Accepts 3.0" Starlight Instruments Feather Touch Focusers
    Material High-Grade Aluminum
    Note This is a custom-machined part; detailed dimensional specifications are not published.

    • 3.0" Adapter for William Optics FLT123 & Megrez 120

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  • Starlight Instruments 2-Year Warranty