120-300mm F2.8 DG OS HSM | Sports (Canon EF mount) firmware v1.01
Sigma · Released Jun 26, 2014 · First seen by GearPulse Jul 5, 2026
What's in this update
It has improved the Auto Focus speed has been improved on “Standard” and “Speed-priority” modes.It has improved the focus accuracy when it is mounted on a Canon EOS-1D Mark III or Canon EOS-1D Mark IV. * Please update to SIGMA Optimization Pro Ver1.2 before operating firmware update of 120-300mm F2.8 DG OS HSM S013.
GearPulse never hosts firmware files — always download from the official source.
Get it from Sigma →