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ZWO Adapter - 2mm M54(M)/M48(F)

ZWO Adapter - 2mm M54(M)/M48(F)

by ZWO
SKU ZWO-M54M-M48F-2
$12.00 - $12.00
$12.00
$12.00 - $12.00
$12.00
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  • Connects M54 Filter Wheels to M48 Accessories
  • Adds Only 2 mm to Optical Path
  • Maintains 55 mm Back Focus Standard
  • Knurled Edge for Secure Grip
  • Designed for ZWO 2" EFW and M54 Filter Drawer
16 in stock
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • ZWO M54 - M48 Adapter (2mm)

    The ZWO M54-M48 Adapter steps down the M54 threads on your 2-inch ZWO EFW or M54 filter drawer to the M48 standard for connecting M48-threaded correctors and accessories, adding only 2 mm of thickness to help maintain the critical 55 mm back focus distance required by most correctors.

    Achieve 55 mm Back Focus with a 2 mm Adapter

    Connecting M48-threaded correctors and accessories to ZWO's larger M54 filter wheels presents a spacing challenge. This 2 mm adapter solves it by providing the exact thread conversion needed without consuming significant back focus. Its minimal 2 mm thickness is a deliberate design choice; a thicker adapter could make it impossible to reach the required 55 mm distance when using off-axis guiders or other accessories.

    Precision Fit for ZWO's 2-inch Filter Wheels

    This adapter is purpose-built for ZWO's ecosystem, ensuring a secure, no-flex fit between the M54 female port on the 2" EFW or M54 Filter Drawer and the M48 male threads of your flattener, corrector, or extension tube. The knurled outer edge gives you a firm grip for easy installation and removal, even in cold weather with gloves on, preventing accidental drops or cross-threading.

  • What is the ZWO M54-M48 2mm Adapter used for?

    This adapter connects a ZWO filter wheel or filter drawer that has a female M54 thread to a flattener, corrector or accessory that has a male M48 thread. Its primary purpose is to make these components compatible while using only 2 mm of the optical path, preserving precious back focus.

    Which ZWO filter wheels are compatible with this M54-M48 adapter?

    This adapter is specifically designed for ZWO accessories that use the M54 thread standard. This includes the ZWO 2" Electronic Filter Wheel (EFW) and the ZWO M54 Filter Drawer.

    I have a ZWO 2" EFW and a refractor flattener with M48 threads. Will this adapter let me reach the 55 mm back focus?

    Yes, this adapter is ideal for that scenario. It joins the telescope side of the EFW to your M48 flattener or adapter, and its thin 2 mm profile is specifically designed to be part of a standard 55 mm back focus imaging train. It lets you integrate the larger filter wheel without preventing you from reaching focus with a flattener or reducer.

    If I'm imaging the Andromeda Galaxy (M31) with a full-frame camera, will this ZWO adapter cause vignetting?

    No. The M54 and M48 thread diameters are large enough to fully illuminate full-frame sensors without causing vignetting. This adapter maintains a clear light path, ensuring even illumination from edge to edge when imaging large targets like the Andromeda Galaxy (M31) or the North America Nebula (NGC 7000).

    Why is the ZWO M54-M48 adapter only 2 mm thick?

    The 2 mm thickness is a critical design feature to preserve back focus. Many correctors require a precise 55 mm distance to the sensor. By being extremely thin, this adapter allows you to use a large-format filter wheel in an imaging train that might also include an off-axis guider, rotator, or other accessories that consume back focus.

    How do I install the ZWO M54-M48 adapter?

    The adapter has male M54 threads and female M48 threads. Simply screw the male M54 side into the telescope-side M54 female port of your ZWO 2" EFW or M54 Filter Drawer. Then, screw your M48 male-threaded flattener, corrector, or extension tube into the female M48 side of the adapter. The knurled edge provides a secure grip for hand-tightening.

  • SKU ZWO-M54M-M48F-2
    Product Type Filter Wheel Adapter
    Optical Length 2 mm
    Male Thread M54 x 0.75
    Female Thread M48 x 0.75
    Compatibility ZWO 2" EFW, ZWO M54 Filter Drawer
    Warranty ZWO - 2 Years

    • ZWO M54 (Male) to M48 (Female) Adapter - 2mm

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  • ZWO 2-Year Manufacturer Warranty