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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 M81 to M72 Female for ESATTO 3"

PrimaLuceLab Adapter from M81 to M72 Female for ESATTO 3"

by PrimaLuceLab
SKU PLL-PL3600252
$69.00 - $69.00
$69.00
$69.00 - $69.00
$69.00
Price Match Policy!
  • Connects M72 male threads to M81 female threads
  • Designed for PrimaLuceLab ESATTO 3" robotic focusers
  • Compatible with PrimaLuceLab ARCO 3" robotic rotators
  • Provides a secure, direct-threaded connection for imaging trains
  • Machined aluminum with black anodized finish
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • PrimaLuceLab Adapter from M81 to M72 Female for ESATTO 3"

    This PrimaLuceLab adapter creates a robust, native-thread connection between the M81 draw tube of an ESATTO 3" robotic focuser or ARCO 3" rotator and any camera or accessory using an M72 male thread. It eliminates potential flexure from slip-fit adapters by providing a rigid, threaded junction essential for supporting heavy imaging equipment.

    Secure M72 Threaded Connection for ESATTO 3" Focusers

    By threading directly onto the M81 draw tube of the ESATTO 3" focuser, this adapter ensures your imaging components are perfectly collinear with the optical axis. This direct-fit approach is critical for astrophotography, where any tilt or sag in the system can compromise image sharpness, especially with large sensors.

    Integrating Accessories into the PrimaLuceLab Ecosystem

    This adapter is a key component for integrating non-standard accessories into the PrimaLuceLab ecosystem. It extends compatibility beyond the native M81 thread, allowing you to connect flatteners, reducers, or off-axis guiders that use the M72 standard to both the ESATTO 3" focuser and the ARCO 3" rotator for a fully automated imaging setup.

  • What is the primary function of the PrimaLuceLab M81 to M72 adapter?

    Its primary function is to convert the M81 female thread on the draw tube of a PrimaLuceLab ESATTO 3" focuser or ARCO 3" rotator into an M72 female thread. This allows you to securely attach cameras, field flatteners, or other accessories that have a corresponding M72 male thread.

    Which PrimaLuceLab products is this M81 to M72 adapter compatible with?

    This adapter is specifically designed for PrimaLuceLab products that feature the large M81 threaded connection. This includes the ESATTO 3" robotic microfocuser and the ARCO 3" robotic rotator.

    How does this PrimaLuceLab M81 to M72 adapter attach to my focuser?

    The adapter has an M81 male thread that screws directly into the M81 female thread on the ESATTO 3" or ARCO 3" draw tube. This creates a solid, rigid connection for the rest of your imaging train.

    What kind of accessories can I connect with this M81 to M72 adapter?

    You can connect any astrophotography accessory that terminates in an M72x1 male thread. This commonly includes:

    • Field flatteners or reducer/correctors
    • Off-axis guiders (OAGs)
    • Custom camera adapters and spacers

    I have a full-frame camera with an M72 male thread. Will this adapter let me connect it securely to my ESATTO 3" on my Ritchey-Chrétien telescope?

    Yes, this is precisely the intended use case. The adapter provides the secure, threaded connection needed to prevent any tilt or sag when using a heavy camera on a large instrument like a Ritchey-Chrétien, ensuring your sensor remains perfectly flat to the focal plane.

    If I'm building an imaging train for my large refractor with an ARCO 3" rotator, is this M81 to M72 adapter the right part for my M72-threaded flattener?

    Yes. If your field flattener has an M72 male thread, this adapter will allow you to connect it directly to the output of the ARCO 3" rotator. This ensures your entire imaging train, from rotator to camera, is rigidly connected for precise framing and rotation.

  • PrimaLuceLab 1-Year Warranty