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June 24th: Store is closed for Quebec National Holiday. Orders placed that day will ship on June 25th.
ZWO M54 Adapter replacing EFW

ZWO M54 Adapter replacing EFW

by ZWO
SKU ZWO-D70-M54F
$29.00 - $29.00
$29.00
$29.00 - $29.00
$29.00
Price Match Policy!
  • Replaces the ZWO EFW to achieve 55mm back focus with the OAG-L
  • Adds only 15 mm of optical length to the imaging train
  • Features an internal thread for a single 2-inch mounted filter
  • Provides rigid M54 connections and includes an M54 to M48 adapter
  • 70 mm diameter body matches ZWO cooled cameras
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • ZWO M54 ASI Cooled Camera Adapter for OAG-L - 70 mm Diameter

    The ZWO M54 ASI Cooled Camera Adapter is the definitive solution for integrating the ZWO OAG-L into your imaging train without a filter wheel, adding just 15 mm of optical path to achieve a precise 55mm back focus. This 70 mm diameter adapter provides a rigid M54 connection directly to your ZWO cooled camera and includes an M54 to M48 adapter for broad compatibility with common correctors. It also features an internal thread, allowing you to mount a single 2-inch filter for streamlined one-shot-color imaging.

    Achieve 55mm Back Focus with the OAG-L

    This adapter solves a common spacing challenge for astrophotographers using the ZWO OAG-L. Instead of coupling the OAG-L with a 20 mm thick electronic filter wheel (EFW), this adapter provides the correct 15 mm spacing needed to hit the standard 55 mm back focus required by most field flatteners and coma correctors. It creates a lighter, simpler, and more rigid connection for imagers who don't need the complexity of a full filter wheel, particularly those using one-shot-color (OSC) cameras.

    Integrated Holder for a Single 2-inch Filter

    More than just a spacer, this adapter is machined with internal threads to accept a single 2-inch mounted filter. This is the ideal setup for OSC imagers who need to use one primary filter—such as a UV/IR Cut, a dual-band, or a light pollution filter—without the weight, cost, and power requirements of an EFW. The adapter securely holds the filter in the light path, maintaining rigidity and preventing tilt.

    Rigid 70mm Body with M54 and M48 Threads

    Engineered for a perfect fit, the adapter's 70 mm diameter body matches the profile of ZWO's cooled cameras, ensuring a solid, seamless connection. It features M54 threads on both sides for direct attachment to the OAG-L and camera. For maximum flexibility, ZWO includes an M54 male to M48 female adapter, allowing you to connect your imaging train to the widely used M48 standard on flatteners and reducers.

  • How does the ZWO D70-M54F adapter help achieve 55mm back focus?

    This adapter is designed to be used with the ZWO OAG-L. It has an optical path of 15 mm. When combined with the OAG-L and a ZWO cooled camera's native back focus, it correctly sets the total distance to the 55 mm required by most telescope correctors. It effectively replaces the 20 mm ZWO EFW in the imaging train for setups that do not require a filter wheel.

    Can I use filters with this ZWO M54 adapter?

    Yes. The adapter features internal threads designed to hold one standard 2-inch mounted filter. This is perfect for using a single light pollution, narrowband, or UV/IR cut filter with a one-shot-color camera.

    Why would I use the ZWO D70-M54F adapter instead of a ZWO EFW?

    This adapter is for imagers who want a simpler, lighter, and more rigid setup. If you use a one-shot-color camera and only need a single filter, this adapter provides the correct spacing for the OAG-L without the cost, weight, and complexity of a full electronic filter wheel (EFW).

    I have a ZWO ASI2600MC camera and an OAG-L. Will this adapter work with my setup?

    Yes, this is the exact component designed for that scenario. The 70 mm body of the ZWO D70-M54F adapter matches the ASI2600MC, and it provides the correct 15 mm spacing to achieve 55 mm back focus when used between the OAG-L and the camera.

    What is the purpose of the included M54 to M48 adapter?

    The main body of the adapter uses M54 threads. However, many telescope flatteners, reducers, and coma correctors use the more common M48x0.75 ("2-inch filter") thread standard. The included M54 Male to M48 Female adapter allows you to connect the entire OAG-L and camera assembly to an M48 threaded corrector.

    Will this ZWO adapter work with non-ZWO 2-inch filters?

    Yes, it is designed to be compatible with standard 2-inch mounted filters from most manufacturers. As long as the filter cell meets the standard M48x0.75 thread and height specifications, it should fit correctly inside the adapter.

  • SKU ZWO-D70-M54F
    Optical Length 15 mm
    Outer Diameter 70 mm
    Connection (Camera Side) M54 Female
    Connection (Telescope Side) M54 Male
    Filter Compatibility 1x 2-inch Mounted Filter (M48x0.75)

    • ZWO 70 mm M54 ASI Cooled Camera Adapter for OAG-L

      × 1

    • M54 Male to M48 Female Adapter

      × 1

    • L8 Screws

      × 1 Set

  • ZWO 2-Year Warranty