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Player One M42F-M48M Adapter - 0mm
Player One M42F-M48M Adapter - 0mm

Player One M42F-M48M Adapter - 0mm

by Player One
SKU POA-M42F-M48M-0
$12.00 - $12.00
$12.00
$12.00 - $12.00
$12.00
Price Match Policy!
  • Adapts M48x0.75 male threads to M42x0.75 female threads
  • Adds 0mm of optical path length, preserving critical back focus
  • Lets an M42 male accessory thread into an M48 female port
  • Ultra-thin profile for use in tight imaging trains
  • Machined from black anodized aluminum to minimize internal reflections
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  • Description
  • FAQ
  • Specifications
  • In the Box
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  • Player One M42F-M48M Adapter - 0mm

    The Player One M42F-M48M Adapter seamlessly bridges the gap between the two most common threaded standards in astrophotography, converting a male M48x0.75 thread to a female M42x0.75 T-thread. Critically, this adapter adds exactly 0mm of optical path length, allowing you to connect different components without consuming any of your system's calculated back focus.

    The 0mm Solution: Connecting M42 and M48 Gear Without Consuming Back Focus

    Modern correctors, reducers, and filter wheels often use the larger M48 (2-inch filter) thread to prevent vignetting with larger sensors. However, many accessories such as extension tubes, nosepieces and T-adapters still use a male M42 T-thread. This adapter threads into an M48 female port so that such an M42 male accessory can be attached.

    In a precisely calculated imaging train, every millimeter of back focus is critical. Standard adapters can add several millimeters of length, which can prevent you from reaching perfect focus or placing the sensor at the corrector's optimal focal plane. By adding 0mm of length, the Player One M42F-M48M adapter ensures your back focus measurements remain completely unchanged, preserving the optical integrity of your setup.

  • What is the Player One M42F-M48M Adapter primarily used for?

    This adapter screws into a component with an M48x0.75 female thread and gives it an M42x0.75 female thread, so an accessory with an M42 male thread can attach without adding any length to the optical path.

    Will the Player One M42F-M48M adapter cause vignetting with my full-frame camera?

    Potentially, yes. Because you are stepping down from a wider M48 opening to a narrower M42 T-thread throat, some vignetting (darkening of the corners) can occur, especially with fast optical systems and full-frame (24x36mm) sensors. This is a physical limitation of the M42 thread standard, not the adapter itself. For APS-C and smaller sensors, it is typically not an issue.

    How does the 0mm length of the Player One adapter help my imaging setup with an SCT and reducer?

    SCT reducers have a very specific back focus distance (e.g., 105mm or 55mm) that must be maintained for proper correction. Using a standard adapter that adds 5mm of length would mean you have to shorten other spacers by 5mm. The Player One 0mm adapter simplifies this by letting you attach an M42 male accessory to an M48 female port without needing to alter your existing spacing calculations.

    What is the thread pitch on the Player One M42F-M48M adapter?

    Both the male M48 thread and the female M42 thread use the standard astronomical pitch of 0.75mm (M48x0.75 and M42x0.75). This ensures compatibility with nearly all astronomical T-threads and 2-inch filter threads.

    Can I use this adapter to attach a 2" filter to my M42 camera nosepiece?

    No, this adapter is not designed to hold filters. It is a thread changer for connecting two primary components in an imaging train. To attach a 2" filter to an M42 accessory, you would typically need an adapter with female M48 threads on one side and male M42 threads on the other, or a dedicated filter holder.

    Is the Player One M42F-M48M adapter made of metal or plastic?

    The adapter is precision-machined from a lightweight and durable aluminum alloy. It features a black anodized finish to minimize stray light and internal reflections within your imaging train, which helps maintain high contrast.

  • Product M42 Female to M48 Male Adapter
    Male Thread M48x0.75
    Female Thread M42x0.75
    Optical Length 0mm
    Kind Thread converter

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  • This product does not require software or have a dedicated manual.

  • Player One 2-Year Warranty