Sigma MOUNT CONVERTER MC-11 (EF-E) firmware v1.24

Sigma · Released Apr 18, 2019 · First seen Jul 5, 2026

v1.24 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

Added compatibility with two Sigma lens models for Canon EF mount.

  • Compatible with 100-400mm F5-6.3 Contemporary lens (firmware 2.05)
  • Compatible with 135mm F1.8 Art lens (firmware 2.02)

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

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What's in this update

It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for CANON EF mount,​ that has the latest firmware Ver.2.05.It has become compatible with the SIGMA 135mm F1.8 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02.

Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, pleas​e ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.

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Other versions for this product

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