Sigma MOUNT CONVERTER MC-11 (EF-E)
firmware v1.08
Sigma · Released Jul 20, 2017 · First seen Jul 5, 2026
v1.08 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
Fixes autofocus issues with certain incompatible lenses.
- Fixed autofocus malfunction with some incompatible lenses
Written from Sigma's release notes, which are printed in full below.
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What's in this update
It corrects the phenomenon that AF does not operate properly when some lenses that are not compatible with the MC-11 are attached.
Note: Before updating the MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.
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Create account & watchChanged since v1.07
- It corrects the phenomenon that AF does not operate properly when some lenses that are not compatible with the MC-11 are attached.
Other versions for this product
See the full firmware history for the MOUNT CONVERTER MC-11 (EF-E)