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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 2.0" Adapter for Tele Vue (IS) Refractor Telescopes

Starlight Instruments 2.0" Adapter for Tele Vue (IS) Refractor Telescopes

by Starlight Instruments
SKU SI-A20-228
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
Price Match Policy!
  • Connects 2.0" Feather Touch focusers to Tele Vue IS refractors
  • Precision-machined for a secure, zero-flexure fit
  • Enables use of heavy imaging trains on Tele Vue optics
  • Manufactured by Starlight Instruments in the USA
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  • Description
  • FAQ
  • In the Box
  • Warranty

  • Starlight Instruments 2.0" Adapter for Tele Vue (IS) Refractor Telescopes

    This Starlight Instruments adapter is the essential component for mounting a high-precision 2.0" Feather Touch focuser onto any Tele Vue Imaging System (IS) refractor, creating an uncompromising, rigid imaging platform.

    Mount a 2.0" Feather Touch Focuser on Your Tele Vue IS Refractor

    Tele Vue's "IS" series refractors are world-class optical systems, but for advanced astrophotography with heavy cameras, filter wheels, and off-axis guiders, the stock focuser can be a point of mechanical flex. This adapter provides the robust, direct-threaded connection needed to replace the original focuser with a Starlight Instruments 2.0" Feather Touch model.

    By upgrading, you gain the legendary precision and high load capacity of a Feather Touch focuser. The result is zero image shift during focusing and a completely rigid optical train, allowing you to take full advantage of your Tele Vue optics for critical deep-sky imaging. Machined in-house by Starlight Instruments, this adapter guarantees a perfect, secure fit between the telescope tube and your new focuser.

  • Which Starlight Instruments focusers is this 2.0" Tele Vue IS adapter for?

    This adapter is designed to fit the Starlight Instruments 2.0" Feather Touch focusers, including both the Crayford (FTF20xxBCR series) and the heavier-duty rack and pinion (FTF20xxBCR-RP series) models.

    Why should I replace the stock focuser on my Tele Vue IS refractor?

    For visual use, the stock Tele Vue focuser is excellent. However, for astrophotography with heavy payloads (e.g., a large sensor camera, filter wheel, and off-axis guider), a Starlight Instruments Feather Touch focuser offers higher load capacity and finer, repeatable focus control. This upgrade eliminates potential sag or flexure, which is critical for sharp, round stars across the field.

    Is installing this Starlight Instruments adapter on my Tele Vue NP101is difficult?

    No, the installation is a straightforward mechanical process that is fully reversible. It typically involves unthreading the entire stock focuser assembly from the rear of the telescope tube and threading this Starlight Instruments adapter in its place. The new 2.0" Feather Touch focuser then attaches to this adapter.

    Will this adapter maintain the correct spacing for my Tele Vue reducer or flattener?

    This adapter is machined to place the base of the Starlight Instruments focuser at the correct mechanical position on the optical tube. However, you are responsible for calculating and setting the correct back focus distance from the focuser drawtube to your camera's sensor, as specified by the requirements of your particular Tele Vue flattener or reducer.

    I have a Tele Vue TV-85, not an NP127is. Will this adapter work?

    No. This adapter is specifically designed for the Tele Vue "IS" or "Imaging System" series telescopes (like the NP101is, NP127is, etc.), which use a specific large-format threaded connection. It will not fit non-IS models like the TV-85 or TV-76, which require a different adapter.

    What is the benefit of using this Starlight Instruments adapter over a generic one?

    Starlight Instruments machines all components in-house in the USA to extremely tight tolerances. This ensures a perfect, rigid, and precisely aligned fit with both the Tele Vue telescope tube and the Feather Touch focuser. This precision prevents any tilt or play in the optical train, which is essential for high-resolution imaging.

    • 2.0" Adapter for Tele Vue (IS) Refractor Telescopes

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  • Starlight Instruments 2-Year Warranty