Largest technical standards by diameter

Largest technical standards by diameter ranked by diameter.

Last updated . Source: Wikidata.

As of 2026-07-08, Canon RF lens mount tops the list with 0.07 m.

  1. #1 Canon RF lens mount — 0.07 m

    interchangeable lens mount

    The Canon RF lens mount is an interchangeable-lens mount developed by Canon for its full-frame mirrorless interchangeable-lens cameras, and featured first by the EOS R, followed by the EOS RP. The RF mount was announced in September 2018. In May 2022, Canon announced APS-C EOS R cameras and RF-S lenses designed for these cameras. Read more on Wikipedia.

    Wikidata
  2. #2 Fujifilm G-mount — 0.07 m

    Medium Format

    The Fujifilm G-mount is a type of interchangeable lens mount designed by Fujifilm for use in the cameras of their Fujifilm GFX series. These cameras have interchangeable lenses. The respective lenses are designed for 43.8 mm x 32.9 mm medium format sensors. Read more on Wikipedia.

    Wikidata
  3. #3 Hasselblad XCD mount — 0.06 m source Wikidata
  4. #4 CONTAX N — 0.06 m source Wikidata
  5. #5 Nikon Z-mount — 0.06 m

    digital camera lens mount

    Nikon Z-mount is an interchangeable lens mount developed by Nikon for its mirrorless digital cameras. It was first used in 2018. With the introduction of the Z-mount, Nikon discontinued its previous mirrorless mount, the Nikon 1 series. Read more on Wikipedia.

    Wikidata
  6. #6 Canon EF-S lens mount — 0.05 m

    lens mount for Canon APS-C DSLRs

    The Canon EF-S lens mount is a derivative of the EF lens mount created for some Canon digital single-lens reflex cameras with APS-C sized image sensors. It was released in 2003. Cameras with the EF-S mount are backward compatible with the EF lenses and, as such, have a flange focal distance of 44.0 mm. Such cameras, however, have more clearance, allowing lens elements to be closer to the sensor than in the EF mount. Only Canon cameras released after 2003 with APS-C sized sensors support the... Read more on Wikipedia.

    Wikidata
  7. #7 Canon EF lens mount — 0.05 m

    standard lens mount on the Canon EOS family

    The EF lens mount is the standard lens mount on Canon’s EOS family of cameras. EF stands for "Electro-Focus": automatic focusing on EF lenses is handled by a dedicated electric motor built into the lens. Mechanically, it is a bayonet-style mount, and all communication between camera and lens takes place through electronic contacts, with no mechanical levers or plungers. Read more on Wikipedia.

    Wikidata
  8. #8 Sigma SA mount — 0.05 m

    lens mount by Sigma corporation

    The Sigma SA-mount is a lens mount by the Sigma Corporation of Japan for use on their autofocus single-lens reflex and mirrorless cameras. It was introduced with the SA-300 in 1992. Originally, the SA-mount was a dual-bayonet mount with inner (SA-IB) and outer (SA-OB) bayonets, the latter being a feature intended to mount heavy telephoto lenses, but never utilized by Sigma and consequently dropped with the release of the SD14 in 2007. Read more on Wikipedia.

    Wikidata
  9. #9 L-Mount — 0.05 m

    lens mount used by Leica, Panasonic and Sigma

    The Leica L-Mount is a bayonet mount developed by Leica Camera AG for interchangeable-lens autofocus digital cameras. Read more on Wikipedia.

    Wikidata
  10. #10 NX Mini mount — 0.05 m source Wikidata