Sigma MOUNT CONVERTER MC-11 (EF-E) firmware v1.23

Sigma · Released Mar 14, 2019 · First seen Jul 5, 2026

v1.23 is not the latest firmware for the Sigma MOUNT CONVERTER MC-11 (EF-E): the current version is v1.43 (August 27, 2026). Go to v1.43

In short — summary by updatemystuff.com

Adds lens compatibility, improves Sony camera stabilization compensation, and enhances flash exposure accuracy.

  • Added support for six Canon EF mount lenses with latest firmware versions
  • Improved image stabilization compensation for Sony α9 and α7III when set to AUTO mode
  • Enhanced exposure accuracy with Sony dedicated flashes

Written from Sigma's release notes, which are printed in full below.

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What's in this update

It has optimized the peripheral illumination correction data when it is used in combination with the SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary for Canon EF mount.

It has become compatible with the SIGMA 30mm F1.4 DC HSM | Art for CANON EF mount, that has the latest firmware Ver.2.00.It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for CANON EF mount, that has the latest firmware Ver.2.03.It has become compatible with the SIGMA 60-600mm F4.5-6.3 DG OS HSM | Sports for CANON EF mount, that has the latest firmware Ver.1.0​1.It has become compatible with the SIGMA 120-300mm F2.8 DG OS HSM | Sports for CANON EF mount, that has the latest firmware Ver.2.00.It has become compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.01.It has become compatible with the SIGMA 85mm F1.4 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02.It has improved the compensation effect when it is used in combination with the Sony α9, Sony α7III and specific lenses*, and their in-camera image stabilization adjustment is set to AUTO.

It has been set to achieve the same effect as when it is adjusted manually.

It has improved the accuracy of exposure when it is used with dedicated flashes manufactured by SONY.

  • Specific lensesSIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary、SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary、SIGMA 18-300mm F3.5-6.3 DC ​MACRO OS HSM | Contemporary、SIGMA 50-100mm F1.8 DC HSM | Art、SIGMA 24-70mm F2.8 DG OS HSM | Art、SIGMA 24-105mm F4 DG OS HSM | Art、SIGMA 60-600mm F4.5-6.3 DG OS HSM | Sports、SIGMA 70-200mm F2.8 DG OS HSM | Sports、SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary、SIGMA 120-300mm F2.8 DG OS HSM | Sports、SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary、SIGMA 150-600mm F5-6.3 DG OS HSM | Sports、SIGMA 70mm F2.8 DG MACRO | Art、SIGMA 85mm F1.4 DG HSM | Art、SIGMA 105mm F1.4 DG HSM | Art、SIGMA 135mm F1.8 DG HSM | Art、SIGMA 500mm F4 DG OS HSM | Sports Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later for both Windows and Macintosh.

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Other versions for this product

See the full firmware history for the MOUNT CONVERTER MC-11 (EF-E)