Sigma ELECTRONIC FLASH EF-630 (SIGMA SA-mount) firmware v1.03

Sigma · Released Dec 22, 2017 · First seen Jul 5, 2026

v1.03 is not the latest firmware for the Sigma ELECTRONIC FLASH EF-630 (SIGMA SA-mount): the current version is v1.05 (August 5, 2021). Go to v1.05

In short — summary by updatemystuff.com

Fixes distance display unit switching in custom mode and occasional unintended flashing with Sync Terminal use.

  • Distance unit display switching in custom mode now works
  • Unintended flashing when using Sync Terminal resolved

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

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What's in this update

It corrects the phenomenon that the distance display cannot be switched between meters and feet in custom​ mode. It corrects the phenomenon that it occasionally flashes unintentionally when the Sync. Terminal is used.

  • Please ensure to update SIGMA Optimization Pro to Ver1.4.1 for Windows, and Ver1.4.0 fo​r 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 (SIGMA SA-mount)