Sigma 100-400mm F5-6.3 DG OS HSM | Contemporary (Canon EF mount)
firmware v1.01
Sigma · Released Jun 6, 2017 · First seen Jul 5, 2026
v1.01 is not the latest firmware for the Sigma 100-400mm F5-6.3 DG OS HSM / Contemporary (Canon EF mount): the current version is v2.07 (October 22, 2020). Go to v2.07
In short — summary by updatemystuff.com
Enhanced autofocus performance and faster optical stabilization when paired with MC-11 converter.
- Improved autofocus performance
- Faster optical stabilization startup with MC-11 converter
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 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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