Sigma MOUNT CONVERTER MC-21 (EF-L)

Sigma MOUNT CONVERTER MC-21 (EF-L) firmware

Sigma · MOUNT CONVERTER MC-21 (EF-L) · Lens

Latest firmware for the Sigma MOUNT CONVERTER MC-21 (EF-L) is v1.4 (December 22, 2022).

Changelog

MOUNT CONVERTER MC-21 (EF-L) firmware changelog

  1. v1.3 v1.4 Adds manual focus assist support for Canon EF mount cinema lenses and compatibility with a 65mm prime lens.

  2. v1.2 v1.3 Fixes incorrect lens name displays, DC crop mode failures for some lenses, and rare communication issues.

  3. v1.1 v1.2

  4. v1.1 first tracked Improves autofocus and optical stabilizer performance, adjusts crop mode for incompatible lenses

Firmware history

  1. Version 1.4 Latest Released Dec 22, 2022 First seen Jul 5, 2026

    Adds manual focus assist support for Canon EF mount cinema lenses and compatibility with a 65mm prime lens. — summary by updatemystuff.com

    Show release notes
    • MF assist i​s now supported when a SIGMA CINE LENS for Canon EF mount is attached.
    • It makes the converter compatible with the SIGMA CINE LENS FF High Speed Prime Line 65mm T1.5 FF for Canon EF mount.
    • When using the S​IGMA FF High Speed Prime Line 65mm T1.5 FF for Canon EF mount, be sure to update the firmware of the SIGMA MOUNT CONVERTER MC-21 EF-L to Ver. 1.4.
    Release notes & download
  2. Version 1.3 Released Jun 25, 2020 First seen Jul 5, 2026

    Fixes incorrect lens name displays, DC crop mode failures for some lenses, and rare communication issues. — summary by updatemystuff.com

    Show release notes

    The firmware will correct the phenomenon whereby it displays different product’s name for some lenses when​ it is attached.

    The firmware will correct the phenomenon whereby the crop does not work for some DC lenses ​when the camera’s DC crop mode is set at “Auto”.The firmware will correct the rarely occurring communication problem with the SIGMA fp.

    Release notes & download
  3. Version 1.2 Released Apr 23, 2020 First seen Jul 5, 2026
    Show release notes

    The firmware wi​ll optimize the communication regarding the current consumption of the Leica SL2.The firmware will improve the phenomenon​ of overexposure when continuous shooting when it is used in combination with Panasonic Lumix DC-S1R / DC-S1.

    Release notes & download
  4. Version 1.1 Released Nov 21, 2019 First seen Jul 5, 2026

    Improves autofocus and optical stabilizer performance, adjusts crop mode for incompatible lenses — summary by updatemystuff.com

    Show release notes

    The firmware will improve the AF performance when using SIGMA fp.The firmware will correct the phenomenon whereby the Optical Stabilizer stops working when using ​an compatible lens in combination with SIGMA fp.The firmware will optimize the operation of the AF function b​utton and Optical Stabilizer when the lens is used in combination with Panasonic Lumix DC-S1R / S1 that has been updated to the latest firmware.

    The firmware will change the DC crop mode not to crop when it is set to Auto when an incompatible lens is attached.

    Release notes & download

Watch the MOUNT CONVERTER MC-21 (EF-L) for updates

Get an email the moment Sigma publishes new firmware. Just your email — no account or password needed.

More Sigma lenses we track