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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.
PrimaLuceLab Adapter ESATTO 3.5" LP for GSO/Orion/TPO Ritchey-Chretien 10, 12, 14 and 16 inches

PrimaLuceLab Adapter ESATTO 3.5" LP for GSO/Orion/TPO Ritchey-Chretien 10, 12, 14 and 16 inches

by PrimaLuceLab
SKU PLL-PL3600367
$125.00 - $125.00
$125.00
$125.00 - $125.00
$125.00
Price Match Policy!
  • Connects ESATTO 3.5" LP Focuser to Large RC Telescopes
  • Telescope-Side Thread: M117x1 Female
  • Compatible with 10", 12", 14", and 16" GSO/Orion/TPO Ritchey-Chretien Models
  • Ultra-Low Profile Design to Maximize Available Back Focus
  • Provides a Secure, Rigid Connection for Astrophotography
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Adapter ESATTO 3.5" LP for GSO/Orion/TPO Ritchey-Chretien 10, 12, 14 and 16 inches

    The PrimaLuceLab Adapter for ESATTO 3.5" LP provides the essential M117 threaded connection for large GSO, Orion, and TPO Ritchey-Chretien telescopes, including 10", 12", 14", and 16" models, while its minimal optical thickness preserves critical back focus for astrophotography.

    M117 Connection for 10" to 16" GSO/Orion/TPO RC Telescopes

    This adapter creates a direct, rigid connection between the PrimaLuceLab ESATTO 3.5" LP robotic focuser and the M117x1 rear cell thread found on large-aperture Ritchey-Chretien telescopes from GSO, Orion, and TPO. It is designed for the 10-inch, 12-inch, 14-inch, and 16-inch models, supporting both aluminum and carbon fiber tube versions.

    By replacing the stock focuser assembly, this adapter allows you to upgrade your instrument with the precision and heavy-load capacity of the ESATTO system, enabling repeatable, automated focusing for serious imaging applications.

    ESATTO 3.5" LP Integration: A Minimal-Thickness Solution

    The primary engineering goal of this adapter is to consume the absolute minimum amount of back focus. For astrophotographers using Ritchey-Chretien telescopes, every millimeter of optical path is critical for accommodating accessories like off-axis guiders, filter wheels, and rotators.

    Its ultra-low profile design ensures that the ESATTO 3.5" LP focuser is mounted as close to the telescope's rear cell as possible, maximizing the available space for your imaging train. While this adapter solves the mounting challenge, note that you may still need appropriate extension tubes to place your specific camera sensor at the telescope's focal plane.

  • What is the purpose of the Adapter for ESATTO 3.5" LP for GSO RC telescopes?

    This adapter allows you to securely mount a PrimaLuceLab ESATTO 3.5" LP robotic focuser onto the rear cell of large GSO, Orion, or TPO Ritchey-Chretien telescopes. It provides the correct M117 thread and has a very low profile to save as much back focus as possible for your camera and accessories.

    Which specific telescopes is this ESATTO 3.5" LP adapter compatible with?

    This adapter is designed specifically for GSO, Orion, and TPO Ritchey-Chretien telescopes with an M117x1 rear thread. This includes the following aperture sizes:

    • 10-inch (254mm)
    • 12-inch (304mm)
    • 14-inch (355mm)
    • 16-inch (406mm)

    How does this ESATTO 3.5" LP adapter help with my astrophotography setup on a 12" RC?

    On a 12" RC, back focus is limited. This adapter's minimal thickness is crucial when building an imaging train that includes an off-axis guider (OAG), a filter wheel, and your camera. It allows you to install the high-precision ESATTO 3.5" LP focuser without consuming the space needed for those essential accessories, which is a common challenge with stock focusers.

    Will I need extension tubes with the ESATTO 3.5" LP adapter?

    Yes, it's possible. This adapter is designed to maximize the available back focus by mounting the focuser close to the tube. However, depending on your specific camera's sensor-to-flange distance and other accessories, you will likely need to add the correct combination of extension tubes to position your camera sensor precisely at the telescope's focal point.

    I'm imaging the galaxy pair M81 and M82 with my 16" TPO RC; why is this low-profile ESATTO 3.5" LP adapter essential?

    For imaging deep-sky targets like the M81/M82 group with a long focal length 16" RC, precise, repeatable focusing is non-negotiable for sharp details. The ESATTO 3.5" LP provides this robotic precision. This low-profile adapter is the essential component that lets you install the focuser on your telescope's M117 thread without giving up the back focus required for your guide camera and filters.

    What thread does this PrimaLuceLab adapter use to connect to the Ritchey-Chretien telescope?

    The adapter features a female M117x1 thread on the telescope side, which is the standard rear cell thread for the compatible GSO, Orion, and TPO Ritchey-Chretien models from 10" to 16" aperture.

  • PrimaLuceLab 1-Year Warranty