MOUNT CONVERTER MC-11 (EF-E) firmware v1.31
Sigma · Released Jun 25, 2020 · First seen by GearPulse Jul 5, 2026
What's in this update
It has become compatible with the SIGMA 500mm F4 DG OS HSM | Sports 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 →