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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 from M56 to SC with Stop Ring for ESATTO 2"

PrimaLuceLab Adapter from M56 to SC with Stop Ring for ESATTO 2"

by PrimaLuceLab
SKU PLL-PL3600225
$125.00 - $125.00
$125.00
$125.00 - $125.00
$125.00
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  • Adapts the ESATTO 2" focuser's M56 thread to a standard female SC thread
  • Enables direct connection of Schmidt-Cassegrain focal reducers and accessories
  • Integrated stop ring allows for precise 360° rotational framing of your camera
  • Secures accessories for a rigid, flex-free imaging train
  • All-metal construction ensures a durable and reliable connection
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • PrimaLuceLab Adapter from M56 to SC with Stop Ring for ESATTO 2"

    The PrimaLuceLab Adapter from M56 to SC with Stop Ring seamlessly integrates your ESATTO 2" focuser with the Schmidt-Cassegrain (SC) accessory ecosystem, converting the focuser's native M56 drawtube thread to securely attach accessories like focal reducers.

    Achieve Perfect Framing: The ESATTO 2" M56 to SC Adapter

    This adapter provides the essential mechanical link between the M56x1 female thread on the ESATTO 2" focuser's drawtube and the wide range of accessories that use the common male Schmidt-Cassegrain thread. It's the key to using popular focal reducers or other SC-threaded correctors directly with your PrimaLuceLab focuser.

    The defining feature is the independent stop ring. After threading your accessory onto the adapter, you can slightly loosen the stop ring to rotate your entire imaging train 360°. This allows you to perfectly frame your target—for example, aligning your sensor with the long axis of the Andromeda Galaxy (M31)—and then lock it down without losing focus or alignment.

    • Secure Connection: Threads directly into the ESATTO 2" drawtube for a rigid, flex-free attachment point that can support a full imaging payload.
    • Precise Rotational Control: The integrated stop ring allows you to orient your camera or accessory and lock it in place, ensuring perfect composition of your astrophoto.
    • Broad Compatibility: Opens up the advanced ESATTO 2" focuser to a wide range of standard SC-threaded accessories, most notably focal reducers from various manufacturers.

  • What is the primary purpose of the PrimaLuceLab M56 to SC adapter for the ESATTO 2"?

    Its primary purpose is to convert the M56 female thread on the drawtube of the ESATTO 2" focuser into a standard female Schmidt-Cassegrain (SC) thread. This allows you to securely attach accessories like focal reducers, off-axis guiders, and other components that use the SC thread standard.

    How does the stop ring on this ESATTO 2" adapter improve my astrophotography?

    The stop ring provides rotational freedom for your entire imaging train. After attaching your camera and accessories, you can loosen the ring, rotate the camera to the ideal angle for framing your target, and then tighten the ring to lock it in that position. This is crucial for achieving optimal composition without having to disassemble your setup.

    Can I use this PrimaLuceLab adapter to connect a Celestron f/6.3 reducer to my ESATTO 2" focuser?

    Yes, absolutely. The Celestron f/6.3 Reducer/Corrector uses a standard male SC thread for attachment to a telescope. This adapter creates the necessary female SC port on your ESATTO 2" focuser, allowing you to thread the reducer in directly and securely.

    If I want to frame the Horsehead Nebula (Barnard 33) vertically with my camera, will this adapter help?

    Yes, this is exactly what the stop ring is designed for. You can attach your camera, achieve focus on a nearby star like Alnitak, and then use the stop ring to rotate your camera so that the distinctive shape of the Horsehead Nebula and Flame Nebula (NGC 2024) fits perfectly along the long axis of your sensor.

    Does this M56 to SC adapter add significant length to my imaging train?

    The adapter and stop ring are designed to be very low-profile. While any adapter adds some optical path length, this component is engineered to add a minimal amount, helping you preserve precious back focus in your imaging setup.

    Is this adapter required to use a 2" diagonal for visual observing with the ESATTO 2"?

    No, this adapter is specifically for SC-threaded accessories. For visual observing with a standard 2" diagonal or eyepiece, you would need the dedicated "2" Visual Back for ESATTO 2"" (PL3600003), which provides a standard 2" eyepiece holder with compression rings.

  • PrimaLuceLab 1-Year Warranty