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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 FLT 110 w/TMB F7 Lens Telescopes

Starlight Instruments 3.0" Adapter for William Optics FLT 110 w/TMB F7 Lens Telescopes

by Starlight Instruments
SKU SI-A30-1903-6
$250.00 - $250.00
$250.00
$250.00 - $250.00
$250.00
Price Match Policy!
  • Connects Starlight Instruments 3.0" focusers to specific telescopes
  • Designed for William Optics FLT 110 with TMB f/7 Lens
  • Features a 115x1.25mm female thread
  • Provides 2.586" of length for correct spacing
  • Enables a solid, flex-free focuser upgrade
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  • Description
  • FAQ
  • Warranty

  • Starlight Instruments 3.0" Adapter for William Optics FLT 110 w/TMB F7 Lens Telescopes

    This Starlight Instruments 3.0" Adapter provides the essential threaded connection for mounting a 3.0" Feather Touch focuser onto your William Optics FLT 110 telescope equipped with the TMB f/7 lens. With a precise length of 2.586 inches and a 115x1.25mm female thread, this adapter ensures correct optical spacing and establishes a rigid, flex-free foundation for your imaging train.

    Precision Fit for the William Optics FLT 110: A 115x1.25mm Connection

    Upgrading your telescope's focuser is one of the most significant improvements you can make for astrophotography. This adapter is the critical component that makes it possible, allowing you to replace the stock focuser on your FLT 110 with a Starlight Instruments 3.0" Feather Touch focuser. The 115x1.25mm thread is machined to mate perfectly with the telescope's optical tube, while the 3.0" aperture on the focuser side eliminates any risk of vignetting with large camera sensors.

    By creating a solid, threaded connection, this adapter removes the potential for flexure and tilt that can occur with less secure mounting systems. This is crucial when using heavy cameras, filter wheels, and off-axis guiders, ensuring your entire imaging system remains perfectly collimated and your stars stay round from edge to edge.

  • What is the purpose of this Starlight Instruments 3.0" Adapter?

    This adapter is designed specifically to allow you to mount a Starlight Instruments 3.0" Feather Touch focuser onto a William Optics FLT 110 telescope that uses the TMB f/7 lens. It provides the correct mechanical threading and optical spacing for the upgrade.

    Will this adapter fit any other William Optics telescope besides the FLT 110?

    No, this adapter is machined for a specific thread size and length (115x1.25mm and 2.586" long) to match the William Optics FLT 110 with the TMB f/7 lens. It will not fit other telescopes, even from the same manufacturer, unless they share these exact specifications.

    What Starlight Instruments focuser does this adapter work with?

    This adapter is engineered to connect to any of the Starlight Instruments 3.0" Feather Touch focusers, such as the FTF3015B-A or FTF3025B-A. It provides the necessary interface between the telescope tube and the base of the 3.0" focuser body.

    Why would I upgrade the focuser on my William Optics FLT 110 for imaging?

    Upgrading to a Starlight Instruments Feather Touch focuser provides ultra-fine focus control, high load capacity for heavy cameras, and zero image shift. This level of precision is critical for achieving the sharpest possible images, especially during high-magnification planetary imaging of targets like Jupiter and Saturn or long-exposure deep-sky astrophotography.

    How does this 3.0" adapter help when imaging large targets like the Andromeda Galaxy (M31) with my FLT 110?

    For large targets that fill the frame of a full-size sensor, a rigid, flex-free connection is paramount. This 3.0" adapter ensures your heavy camera and the large focuser are held perfectly square to the optical axis, preventing tilt that can cause elongated stars in the corners of your images of the Andromeda Galaxy (M31).

    Is installation of the Starlight Instruments adapter difficult?

    Installation is typically straightforward. It involves unthreading the stock focuser assembly from the rear of the telescope tube and carefully threading this adapter in its place. Once the adapter is securely attached to the telescope, the 3.0" Feather Touch focuser can then be installed onto the adapter.

  • Starlight Instruments 2-Year Warranty