Sigma MOUNT CONVERTER MC-11 (EF-E) firmware v1.34

Sigma · Released Sep 17, 2020 · First seen Jul 5, 2026

v1.34 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 14mm F1.8 and 50mm F1.4 DG HSM Art lenses.

  • Supports 14mm F1.8 DG HSM Art lens with firmware 2.01
  • Supports 50mm F1.4 DG HSM Art lens with firmware 2.03
  • Requires SIGMA Optimization Pro 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 com​patible with the SIGMA 14mm F1.8 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.01.It makes the converter compatible with the SIGMA 50mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.03.

  • Please be su​re to update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware. SIGMA Optimization Pro

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Changed since v1.33

  • It makes the converter compatible with the SIGMA 14mm F1.8 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.01.It makes the converter compatible with the SIGMA 50mm F1.4 DG HSM | Art 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)