Skip to content
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 2.5" Adapter for TMB80/Sky-Watcher Equinox 80/100/120mm Telescopes

Starlight Instruments 2.5" Adapter for TMB80/Sky-Watcher Equinox 80/100/120mm Telescopes

by Starlight Instruments
SKU SI-A25-2003-20
$250.00 - $250.00
$250.00
$250.00 - $250.00
$250.00
Price Match Policy!
  • Adapts 2.5" Starlight Instruments Feather Touch focusers
  • Precision-machined for a secure, no-flex connection
  • Compatible with TMB80 and Pentax 125 refractors
  • Fits Sky-Watcher Equinox 80mm, 100mm, and 120mm models
Backordered
Request Stock Alert
Availability Info
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Warranty

  • Starlight Instruments 2.5" Adapter for TMB80/Sky-Watcher Equinox 80/100/120mm Telescopes

    This Starlight Instruments adapter allows you to mount a premium 2.5" Feather Touch focuser onto specific high-end refractors, including the TMB80 and Pentax 125. It is also designed for a direct, secure fit on the Sky-Watcher Equinox series, covering the 80mm, 100mm, and 120mm models, providing the essential mechanical link for a major focusing upgrade.

    Upgrade to a 2.5" Feather Touch Focuser

    This adapter is the key component for replacing your telescope's stock focuser with a Starlight Instruments 2.5" Feather Touch. By doing so, you gain the ultra-smooth, zero-image-shift focusing and heavy-duty load capacity required for serious astrophotography. A Feather Touch focuser eliminates the limitations of factory-standard units, enabling precise, repeatable focus adjustments with heavy cameras, filter wheels, and other accessories.

    Direct-Fit for TMB80, Equinox 80/100/120, and Pentax 125

    Unlike generic adapters, this component is custom-machined to couple seamlessly with the specific tube assemblies of several popular refractors. This ensures perfect alignment of the optical axis and a rigid connection that prevents tilt or flexure under load. The adapter provides a secure, factory-grade fit for the following telescopes:

    • TMB80
    • Sky-Watcher Equinox 80mm, 100mm, and 120mm
    • Pentax 125

  • What is the purpose of this Starlight Instruments 2.5" Adapter?

    This adapter serves as the mechanical interface to connect a Starlight Instruments 2.5" Feather Touch focuser to the optical tube of specific telescopes, including the TMB80, Pentax 125, and Sky-Watcher Equinox 80mm, 100mm, and 120mm models. It is required to perform this popular focuser upgrade.

    Will this adapter fit my Sky-Watcher Equinox 120mm refractor?

    Yes, this adapter is specifically designed to provide a direct, secure fit for the Sky-Watcher Equinox 120mm, as well as the 80mm and 100mm models in the same series.

    Do I need this adapter to install any Starlight Instruments focuser on my TMB80?

    This adapter is specifically for the 2.5" Feather Touch focuser. If you intend to install a different size focuser (e.g., a 3.0" or 2.0" model), you would need a different, corresponding adapter. This part is only for mating a 2.5" focuser to the TMB80 tube.

    Is this adapter difficult to install on a Pentax 125?

    Installation is typically straightforward for users comfortable with basic telescope hardware. It involves removing the stock focuser from the telescope tube and attaching this adapter in its place, followed by mounting the new 2.5" Feather Touch focuser to the adapter. No modification to the telescope tube is required.

    Why should I upgrade the stock focuser on my Sky-Watcher Equinox 100mm?

    Upgrading to a 2.5" Feather Touch focuser provides significant benefits for imaging. It offers superior load-bearing capacity for heavy cameras and accessories, eliminates focus shift, and provides extremely fine control for achieving critical focus, which is often a limitation of stock focusers.

    Does this adapter work with focusers other than the Starlight Instruments 2.5" Feather Touch?

    No, this adapter is engineered specifically for the mounting pattern and dimensions of the Starlight Instruments 2.5" focuser family. It is not compatible with focusers from other manufacturers or other sizes from Starlight Instruments.

  • Starlight Instruments 2-Year Warranty