Sigma MOUNT CONVERTER MC-11 (EF-E) firmware v1.38

Sigma · Released Jul 8, 2021 · First seen Jul 5, 2026

v1.38 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

Enables compatibility with SIGMA 500mm F4 DG OS HSM Sports lens firmware version 2.03.

  • Adds support for SIGMA 500mm F4 DG OS HSM Sports lens
  • Requires lens firmware version 2.03
  • SIGMA Optimization Pro must be updated to version 1.6.0 or later

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

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What's in this update

It makes the converter compatible with the SIGMA 500mm F4 DG OS HSM | Spo​rts in Canon EF mount, that has the latest firmware Ver.2.03.

  • Please be sure to update SIGMA Optimization Pro to Ver.1.6.0 or later when updati​ng the MC-11 firmware. SIGMA Optimization Pro

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Changed since v1.37

  • It makes the converter compatible with the SIGMA 500mm F4 DG OS HSM | Sports in Canon EF mount, that has the latest firmware Ver.2.03.

Other versions for this product

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