100-400mm F5-6.3 DG OS HSM | Contemporary (Canon EF mount) firmware v1.01
Sigma · Released Jun 6, 2017 · First seen by GearPulse Jul 5, 2026
What's in this update
It has improved the AF performance.When attached to the SIGMA MOUNT CONVERTER MC-11 EF-E (ver. 1.06), it offers not only the improved AF performance, but also enables the OS mechanism to start operating faster than before.
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