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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 2" for Telescopes with SC Thread

PrimaLuceLab Adapter ESATTO 2" for Telescopes with SC Thread

by PrimaLuceLab
SKU PLL-PL3600209
$35.00 - $35.00
$35.00
$35.00 - $35.00
$35.00
Price Match Policy!
  • Connects ESATTO 2" Motorized Focuser to SC Telescope Threads
  • Adds 0mm of Optical Thickness to the Imaging Train
  • Compatible with Celestron SCT and EdgeHD 800 Models
  • Enables Precise External Focusing to Eliminate Mirror Shift
  • Preserves Back Focus for Focal Reducers and Accessories
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • PrimaLuceLab Adapter ESATTO 2" for Telescopes with SC Thread

    The PrimaLuceLab Adapter for ESATTO 2" connects the focuser directly to the rear cell of popular Schmidt-Cassegrain telescopes like the Celestron C6, C8, C9.25, and EdgeHD 800. This adapter adds exactly 0mm of optical thickness, preserving the ESATTO 2" focuser's native 67mm profile. This maintains critical back focus for imaging accessories and allows you to bypass the telescope's internal mechanics for repeatable, shift-free focusing.

    Connect the ESATTO 2" to C8, C9.25 & EdgeHD 800 Telescopes

    This adapter provides a robust, direct-thread connection between the ESATTO 2" robotic focuser and the standard 2" Schmidt-Cassegrain thread found on the rear cell of many popular telescopes. It is specifically designed for a secure, perfectly aligned fit on models including the Celestron C6, C8, C9.25, and the EdgeHD 800, transforming them into precise imaging instruments.

    A 0mm Back Focus Design to Preserve Critical Optical Path

    Back focus is a finite resource, especially on SCTs equipped with focal reducers. This adapter is engineered to consume none of it. By fitting internally into the ESATTO 2" focuser body, it adds no length to the optical path, ensuring the entire 67mm of the ESATTO's thickness is all you add to your imaging train. This intelligent design leaves you the maximum possible back focus for connecting focal reducers, off-axis guiders, filter wheels, and your camera.

    Bypass Mirror Shift on f/10 Schmidt-Cassegrains

    The primary reason to add an external focuser to an SCT is to eliminate mirror shift and flop caused by the primary mirror focusing mechanism. This adapter allows you to install the ESATTO 2", lock the telescope's primary mirror in place, and achieve incredibly fine and repeatable focus externally. The result is consistently sharper stars, improved autofocus accuracy, and the elimination of frustrating image shift during a focusing routine.

  • Which telescopes work with the PrimaLuceLab ESATTO 2" SC Adapter?

    This adapter is designed for any telescope with a standard 2" SC male thread on the rear cell. It is confirmed to be compatible with popular models like the Celestron C6, C8, C9.25, and the EdgeHD 800.

    Will this ESATTO 2" adapter use up my available back focus?

    No, it will not. The adapter is designed to fit inside the body of the ESATTO 2" focuser, meaning it adds 0mm of optical thickness to your imaging train. This is critical for preserving precious back focus for accessories like focal reducers and cameras.

    How does this adapter help with mirror shift on my Celestron C9.25 SCT?

    By allowing you to attach the ESATTO 2" focuser, you no longer need to use the telescope's main focusing knob, which moves the primary mirror. You can lock the primary mirror in place (if your scope has mirror locks) and use the ESATTO for all focusing adjustments. This completely bypasses the source of mirror shift, resulting in a stable and repeatable focus point.

    Can I use my f/6.3 focal reducer on an EdgeHD 800 with this setup?

    Yes. After attaching the ESATTO 2" to your EdgeHD 800 with this adapter, you can add the PrimaLuceLab SC thread adapter (PL3600225) to the drawtube of the ESATTO. This provides the necessary SC thread to attach your f/6.3 reducer, followed by your camera at the correct spacing.

    What do I need to connect a 2" diagonal or camera to the ESATTO 2" focuser?

    Once this adapter is installed, you will need the PrimaLuceLab 2" Visual Back (PL8410001). This threads onto the M56 drawtube of the ESATTO 2" and provides a standard 2" opening with a non-marring brass compression ring to securely hold your diagonal, eyepiece, or camera nosepiece.

    Is this adapter compatible with the ESATTO 3" or 4" models?

    No, this adapter is specifically designed to fit the mechanical and optical profile of the ESATTO 2" robotic focuser only. Different adapters are required for the larger ESATTO models.

  • Focuser Compatibility PrimaLuceLab ESATTO 2"
    Telescope Connection Standard 2" Schmidt-Cassegrain (SC) Thread
    Telescope Compatibility Celestron C6, C8, C9.25, EdgeHD 800, and other SC telescopes
    Added Optical Thickness 0mm

    • Adapter ESATTO 2" for Telescopes with SC Thread

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  • PrimaLuceLab 1-Year Warranty