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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.
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.
Player One M48M-M42M Adapter - 2mm

Player One M48M-M42M Adapter - 2mm

by Player One
SKU POA-M48M-M42M-2
$18.00 - $18.00
$18.00
$18.00 - $18.00
$18.00
Price Match Policy!
  • Adapts M48x0.75mm Female Threads to M42x0.75mm Female Threads
  • Provides 2mm of Optical Path Length
  • Male Threads on Both Sides (M48M-M42M)
  • Standard 0.75mm Thread Pitch
  • Black Anodized Aluminum Construction
2 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Player One M48M-M42M Adapter - 2mm

    The Player One M48M-M42M Adapter connects M48 (2-inch filter) female-threaded accessories to M42 (T-thread) female-threaded components. This male-to-male adapter adds precisely 2mm of optical path length, which is critical for achieving correct back focus in complex imaging trains. Both the M48 and M42 threads feature a standard 0.75mm pitch for broad compatibility with most astronomy gear.

    Precision 2mm Spacing for Critical Back Focus

    This adapter is more than a simple thread converter; it's a precision spacing tool. The fixed 2mm thickness allows you to make fine adjustments to your back focus distance, helping to ensure your flattener or reducer is at the optimal distance from the sensor for sharp stars across the entire frame.

    Connect M48 and M42 Female-Threaded Accessories

    Engineered with male M48x0.75mm threads on one side and male M42x0.75mm threads on the other, this adapter joins two components that both have female threads. This configuration is often required when connecting a larger format filter wheel (with an M48 female input) to a camera or off-axis guider that has a female M42 T-thread input.

  • What is the primary use for the Player One M48M-M42M Adapter?

    It connects two accessories that both have female threads—specifically, an M48x0.75mm female port and an M42x0.75mm female T-thread port. It also serves as a spacer, adding a precise 2mm of length to your optical train to help achieve correct back focus.

    How does the 2mm thickness of this Player One adapter affect my imaging train?

    The 2mm thickness adds directly to your total back focus distance. This is useful when you are slightly short of the required spacing for a field flattener or reducer. However, you must account for this extra 2mm in your calculations, as it could prevent you from reaching focus if your train is already near its maximum length.

    Can I use this M48M-M42M adapter to connect my M48 filter wheel to an M42 T-ring?

    It depends on the specific threads of your components. This adapter is designed for female-to-female connections. If your filter wheel has a female M48 thread and your T-ring (or camera) has a female M42 thread, this adapter will join them correctly.

    What are the exact thread specifications for the Player One adapter?

    The adapter has male M48x0.75mm threads on one side and male M42x0.75mm threads on the other side. The "M" in the product name (M48M-M42M) designates male threads on both ends.

    Is this Player One adapter compatible with accessories from other brands?

    Yes. M48x0.75mm (often called 2" filter thread) and M42x0.75mm (the standard T-thread) are industry standards for astrophotography. This adapter should be compatible with any equipment from any brand that uses these standard female threads.

    Why would I need an adapter with male threads on both sides?

    A male-to-male adapter, sometimes called a "gender changer," is necessary when you need to connect two components that both have female threads. For example, some focal reducers have a female M48 thread on the camera side, and many astronomy cameras have a female M42 T-thread. This adapter bridges that specific connection.

  • Player One 2-Year Warranty