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William Optics Micro 4/3 48mm T-Mount for Olympus - Black

William Optics Micro 4/3 48mm T-Mount for Olympus - Black

by William Optics
SKU WO-TM-MFT-M48
CA$65.00 - CA$65.00
CA$65.00
CA$65.00 - CA$65.00
CA$65.00
Price Match Policy!
  • Connects M48 Correctors to Olympus Micro 4/3 Cameras
  • Fixed 35.6 mm Optical Length for Precise Back Focus
  • Light-In Connection: M48 (Female) Thread
  • Light-Out Connection: Olympus Micro 4/3 Bayonet Mount
  • Durable Single-Piece Aluminum Construction
3 in stock
Qualifies for FREE Shipping in Canada on orders over $500.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • William Optics Micro 4/3 48mm T-Mount for Olympus - Black

    The William Optics Micro 4/3 48mm T-Mount provides a direct, secure connection from any M48 female thread to your Olympus or Panasonic Micro 4/3 camera body. Its single-piece design is machined to a precise optical length of 35.6 mm, achieving the ideal standard 55 mm total back focus requirement when paired with a Micro 4/3 camera body.

    Precision Spacing: Achieving 55mm Total Back Focus

    A field flattener or reducer-flattener only delivers sharp, point-like stars across the entire frame when the camera sensor is placed at a specific distance from its rear lens element. This William Optics T-Mount provides the exact 35.6 mm optical path length that, when combined with the internal flange focal distance of a Micro 4/3 camera, yields the total 55 mm back focus needed for William Optics refractors.

    Using this single, rigid adapter removes the guesswork and potential for tilt. The result is a mechanically solid imaging train and a flat, fully corrected field of view, letting you get the most out of your William Optics telescope.

  • What is the primary purpose of the William Optics M48 T-Mount for Micro 4/3?

    This adapter connects a field flattener or other corrector with a standard M48 (2-inch filter) thread to any camera body that uses the Olympus/Panasonic Micro 4/3 mount. Its main function is to provide an optical length of 35.6 mm, reaching a total system back focus of 55 mm once attached to your Micro 4/3 camera.

    Why is the 35.6 mm optical length of this William Optics T-Mount critical for imaging?

    Field flatteners are designed to work at a specific distance from the camera sensor (typically 55 mm total). If the spacing is incorrect, you will see elongated or out-of-focus stars in the corners of your images. Combined with a Micro 4/3 camera sensor distance, this adapter delivers the exact 55 mm total back focus needed to produce sharp stars from edge to edge.

    I have a William Optics RedCat 51. Is this the right T-Mount for my Olympus OM-D E-M1 camera?

    Yes, this is the correct adapter. The RedCat 51 has an integrated flattener that terminates in an M48 thread. The William Optics M48 T-Mount for Micro 4/3 will connect directly to the telescope and your Olympus camera, establishing the full 55 mm back focus for a fully corrected image.

    Can I use this William Optics M48 T-Mount with a non-William Optics telescope?

    Yes, provided your telescope's flattener has an M48 output thread and requires a standard 55 mm back focus when paired with a Micro 4/3 camera body. Always verify the back focus requirement of your specific flattener before imaging.

    Does the William Optics M48 T-Mount cause vignetting with my Micro 4/3 camera?

    No. The M48 thread provides a wide, fully illuminated light cone that is significantly larger than the sensor used in Micro 4/3 cameras. This ensures there is no vignetting or light fall-off at the edges of the frame caused by the adapter itself.

    Will the William Optics M48 T-Mount work with my ZWO cooled astronomy camera?

    No. This adapter features a bayonet mount for DSLR and mirrorless cameras like those from Olympus and Panasonic. It will not attach to a cooled astronomy camera, which typically uses direct threaded connections (like M42 or M48).

  • Light-In Side M48 (female)
    Light-Out Side Olympus Micro 4/3 Camera Mount
    Optical Length 35.6 mm (55 mm total back focus with Micro 4/3 camera)

    • William Optics Micro 4/3 48mm T-Mount

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  • William Optics 2-Year Warranty