Sigma 120-300mm F2.8 DG OS HSM | Sports (Canon EF mount)
firmware v1.01
Sigma · Released Jun 26, 2014 · First seen Jul 5, 2026
v1.01 is not the latest firmware for the Sigma 120-300mm F2.8 DG OS HSM / Sports (Canon EF mount): the current version is v2.02 (July 21, 2020). Go to v2.02
In short — summary by updatemystuff.com
Autofocus speed and accuracy improvements, especially for Canon EOS-1D models.
- Autofocus speed improved in Standard and Speed-priority modes
- Focus accuracy enhanced on Canon EOS-1D Mark III and IV
Written from Sigma's release notes, which are printed in full below.
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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.
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See the full firmware history for the 120-300mm F2.8 DG OS HSM | Sports (Canon EF mount)