Sigma ELECTRONIC FLASH EF-630 (Canon EF mount) firmware v1.01

Sigma · Released Jun 23, 2017 · First seen Jul 5, 2026

v1.01 is not the latest firmware for the Sigma ELECTRONIC FLASH EF-630 (Canon EF mount): the current version is v1.05 (August 5, 2021). Go to v1.05

In short — summary by updatemystuff.com

Fixed flash not firing with X Sync contact in Manual Flash mode.

  • X Sync contact firing corrected in Manual Flash mode

Written from Sigma's release notes, which are printed in full below.

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What's in this update

It has corrected the phenom​enon that the flash does not fire when using the X Sync. contact in Manual Flash mode.

  • The firmware can be updated using SIGMA FLASH USB DOCK FD-11 for CANON with firmware Ver1.01.
  • Please ensure to update​ SIGMA Optimization Pro to Ver1.4.1 for Windows, and Ver1.4.0 for Macintosh before updating the firmware.
  • It takes about 3 minutes to update the firmware.

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Other versions for this product

See the full firmware history for the ELECTRONIC FLASH EF-630 (Canon EF mount)