Sigma MOUNT CONVERTER MC-11 (EF-E) firmware v1.29

Sigma · Released Jan 23, 2020 · First seen Jul 5, 2026

v1.29 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 compatibility with SIGMA 100-400mm Contemporary lens.

  • Supports 100-400mm Contemporary lens with firmware 2.06
  • Requires SIGMA Optimization Pro 1.5.0 or later before updating

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.2.06. Note: Before updating the SIGMA MOUNT CONVERT​ER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.

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Changed since v1.28

  • 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.2.06.

Other versions for this product

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