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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.
William Optics 48mm T-Mount for Nikon Z
William Optics 48mm T-Mount for Nikon Z
William Optics 48mm T-Mount for Nikon Z
William Optics 48mm T-Mount for Nikon Z
William Optics 48mm T-Mount for Nikon Z
William Optics 48mm T-Mount for Nikon Z

William Optics 48mm T-Mount for Nikon Z

by William Optics
SKU WO-TM-NK-Z-M48
$68.00 - $68.00
$68.00
$68.00 - $68.00
$68.00
Price Match Policy!
  • Connects M48 accessories to Nikon Z-mount mirrorless cameras
  • Precisely machined 38.4 mm optical length achieves exact 55mm back focus when combined with camera
  • M48 (female) threads offer a wide, unvignetted light path
  • Solid, single-piece metal construction for flexure-free imaging
  • Designed for William Optics flatteners and reducers
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • William Optics 48mm T-Mount for Nikon Z

    The William Optics 48mm T-Mount for Nikon Z provides a secure, direct connection from any M48 x 0.75 female thread to a Nikon Z-mount mirrorless camera body. Consuming exactly 38.4 mm of optical path, it works seamlessly with your camera body to achieve the standard 55 mm back focus for flat-field astrophotography.

    M48 T-Mount for Nikon Z: Built for Standard 55mm Back Focus

    This T-Mount is engineered to place your Nikon Z sensor at the exact back focus distance required by your William Optics flattener or reducer. The precise 38.4 mm optical length combines directly with the Nikon Z mount's 16 mm flange focal distance (plus sensor glass optical path) to yield the required 55 mm total back focus directly—no additional spacers required.

    • Solid Mechanical Connection: Machined from a single piece of metal, this mount creates a rigid, flex-free connection between your camera and telescope, preventing tilt that can ruin an otherwise perfect image.
    • Full-Frame Illumination: The M48 threading provides a wide light path necessary to fully illuminate large mirrorless sensors without clipping the corners of the image, a common problem with smaller M42 adapters.
    • Plug-and-Play Spacing: By delivering the exact 55 mm optical path out of the box when attached to your camera, this adapter removes all guesswork and guarantees peak optical performance without extra extension tubes.

  • What is the purpose of the William Optics 48mm T-Mount for Nikon Z?

    This T-Mount serves as a specialized adapter to securely connect a Nikon Z-mount mirrorless camera to a telescope's flattener, reducer, or other accessory that uses standard M48 (female) threads. When attached to your camera body, it establishes the standard 55 mm total back focus required for flat-field astrophotography without needing extra spacers.

    How does the 38.4mm optical length of this William Optics T-Mount achieve 55mm back focus?

    When combined with a Nikon Z-mount camera body (which has a 16mm flange distance), the adapter's 38.4mm optical length brings the total system distance to exactly 55mm directly from your M48-threaded corrector without requiring additional spacers.

    Will this M48 T-Mount work with my older M42 T-ring accessories?

    No, not directly. This adapter has M48 (female) threads, which are larger in diameter than M42 threads. While you could use a separate M42-to-M48 step-up ring, doing so may introduce vignetting (darkened corners) on full-frame cameras and would alter the precise optical length.

    How does the William Optics M48 T-Mount prevent vignetting on my Nikon Z7?

    The full-frame sensor in a Nikon Z7 requires a wide light cone from the telescope. The M48 thread standard has a larger clear aperture than the older M42 "T-thread" standard. This wider opening ensures the light cone isn't physically blocked before it reaches the corners of your sensor, resulting in more even illumination across the entire photograph.

    Is this T-Mount compatible with all William Optics telescopes?

    This T-Mount is compatible with any William Optics flattener or reducer that terminates in a male M48 thread and requires a standard 55mm back focus when paired with a camera body. It delivers that 55mm optical distance directly out of the box without requiring extra spacers.

    What is the difference between this William Optics T-Mount and a generic camera adapter?

    The key difference is precision. This T-Mount is not just a physical adapter; it is an optical component engineered with a 38.4 mm optical length designed specifically to bring Nikon Z cameras to the standard 55mm back focus distance out of the box, ensuring sharp, coma-free stars across the entire sensor.

  • Input Thread M48 (female)
    Camera Mount Nikon Z Mirrorless
    Optical Length 38.4 mm

    • William Optics 48mm T-Mount for Nikon Z

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  • William Optics 2-Year Warranty