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.
PrimaLuceLab Adapter from M81 to M65 with stop ring for ESATTO 3" and ARCO 3"

PrimaLuceLab Adapter from M81 to M65 with stop ring for ESATTO 3" and ARCO 3"

by PrimaLuceLab
SKU PLL-PL3600350
$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00
Price Match Policy!
  • Adapts the M81 thread of ESATTO 3" and ARCO 3" systems to an M65 male thread
  • Enables direct connection of cameras and accessories with M65 female threads
  • Integrated M65 stop ring allows for precise rotational adjustment
  • Provides rigid, secure framing for your imaging train
Backordered
Request Stock Alert
Availability Info
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Adapter from M81 to M65 with stop ring for ESATTO 3" and ARCO 3"

    This adapter seamlessly converts the M81 thread of your PrimaLuceLab ESATTO 3" focuser or ARCO 3" rotator to a male M65 thread, enabling a direct, secure connection for M65-threaded accessories. An integrated M65 stop ring provides critical rotational control, ensuring your camera sensor can be perfectly aligned when attached to your 3-inch ESATTO or ARCO imaging system.

    Secure M81 to M65 Adaptation for ESATTO 3" and ARCO 3"

    Designed specifically for the PrimaLuceLab 3-inch ecosystem, this adapter provides the essential mechanical link between the M81 drawtube thread and the common M65 thread found on many cameras and accessories. By threading this adapter directly onto your ESATTO 3" or ARCO 3", you create a solid, flex-free foundation for your imaging train without relying on less secure compression fittings.

    Precise Camera Framing: The Integrated M65 Stop Ring

    The key feature of this adapter is the M65 stop ring. This independent locking collar allows you to achieve perfect framing by fixing your camera at any rotational angle. Simply thread your camera onto the adapter, rotate it to the desired orientation, and then tighten the stop ring against the camera body to lock it securely in place, preventing any unwanted rotation during an imaging session.

  • What is the purpose of the PrimaLuceLab M81 to M65 adapter for ESATTO 3"?

    This adapter's primary function is to connect cameras or other imaging accessories that have a female M65 thread to the male M81 thread found on the draw tube of the PrimaLuceLab ESATTO 3" robotic focuser and ARCO 3" robotic rotator.

    How does the M65 stop ring on this adapter work?

    The stop ring is a separate locking collar on the M65 thread. It allows you to precisely set the rotation of your camera. You can thread your camera on, back it off slightly to get the perfect orientation, and then tighten the stop ring against the camera body to lock it firmly in that position.

    I have an ESATTO 3" on my Ritchey-Chrétien telescope; is this the correct adapter for my M65-threaded camera?

    Yes. If you have an ESATTO 3" focuser, regardless of the telescope it's mounted on, this adapter is the correct component to securely attach any accessory or camera that uses an M65 female thread.

    When imaging the Veil Nebula (NGC 6960), why is the stop ring on the M81 to M65 adapter useful?

    The stop ring is critical for framing large, elongated targets like the Veil Nebula (NGC 6960). It allows you to precisely orient your camera's sensor to align with the shape of the nebula, ensuring you can capture its full extent within your field of view without leaving the threaded connection loose.

    Can I use this M81 to M65 adapter with the smaller ESATTO 2" focuser?

    No, this adapter is not compatible with the 2-inch model. It is designed exclusively for the large M81 thread present on the ESATTO 3" and ARCO 3" systems.

    My camera ends up upside-down when I fully tighten it onto the M81 to M65 adapter. How do I fix this?

    This is the exact problem the integrated M65 stop ring solves. First, ensure the stop ring is loosened. Thread on your camera until it is snug, then carefully rotate it backward until it is correctly oriented. Finally, tighten the stop ring firmly against the base of your camera to lock it in the correct position.

  • Compatibility PrimaLuceLab ESATTO 3", ARCO 3"
    Focuser/Rotator Side Thread M81 Female (to connect to M81 male thread)
    Camera/Accessory Side Thread M65 Male
    Adjustment Feature Integrated M65 Stop Ring for Rotational Lock

    • Adapter from M81 to M65 with stop ring

      × 1

  • PrimaLuceLab 1-Year Warranty