Sigma MOUNT CONVERTER MC-11 (EF-E) firmware `v1.37`

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

v1.37 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 support for five Art lenses and fixes occasional video blinking.

Added compatibility with five SIGMA Art lenses
Fixed intermittent video blinking during recording

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 30mm F1.4 DC HSM | Art in Canon EF mount, that has the latest firmware Ver.2.01.It makes the converter compatible with the SIGMA 28mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.1.02.It makes the converter compatible with the SIGMA 70mm F2.8 DG MACRO | Art in Canon EF mount, that has the latest firmware Ver.1.01.It makes the converter compatible with the SIGMA 85mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver. 2.03.It makes the converter compatible with the SIGMA 135mm F1.8 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.03.It has improved a rarely-occurring blinking phenomenon during movie shooting.

Please be sure 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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Other versions for this product

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