MOUNT CONVERTER MC-11 (EF-E) firmware v1.29
Sigma · Released Jan 23, 2020 · First seen by GearPulse Jul 5, 2026
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 CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.
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