Sigma MOUNT CONVERTER MC-11 (EF-E) firmware v1.04

Sigma · Released Mar 21, 2017 · First seen Jul 5, 2026

v1.04 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 support for additional photo and cinema lenses.

  • Compatibility with 135mm F1.8 Art and 100-400mm Contemporary photo lenses
  • Support for five FF High Speed cinema prime lenses (20mm to 85mm T1.5)
  • Added support for 24-35mm T2.2 FF cinema zoom lens

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

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What's in this update

It has bec​ome compatible with the SIGMA 135mm F1.8 DG HSM | Art and SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary.

It has become compatible with the Cine Lenses; SIGMA 20 mm T1.5 FF EF mount, 24 mm T1.5 FF EF mount, 35mm T1.5 FF EF mount, 50 mm T1.5 FF EF mount, 85 mm T1.5 FF EF mou​nt from FF High Speed Prime Line, and 24-35mm T2.2 FF EF mount from FF Zoom Line.

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Other versions for this product

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