MOUNT CONVERTER MC-11 (EF-E) firmware v1.39
Sigma · Released Oct 21, 2021 · First seen by GearPulse Jul 5, 2026
What's in this update
It makes the converter compatible with the SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary in Canon EF mount, that has the latest firmware Ver2.03.
GearPulse never hosts firmware files — always download from the official source.
Get it from Sigma →