MOUNT CONVERTER MC-11 (EF-E) firmware v1.24
Sigma · Released Apr 18, 2019 · 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.2.05.It has become compatible with the SIGMA 135mm F1.8 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02. 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.
GearPulse never hosts firmware files — always download from the official source.
Get it from Sigma →