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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
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  • 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