Thank you for purchasing and using our products.

We would like to announce the firmware update for the SIGMA ELECTRONIC FLASH EF-630 for Canon.
This firmware update corrects the phenomenon that the flash does not fire when using the X Sync. contact in Manual Flash mode. For customers who own the SIGMA FLASH USB DOCK FD-11 for Canon, please update the flash firmware via SIGMA Optimization Pro.

Applicable product
SIGMA ELECTRONIC FLASH EF-630 for Canon

Benefit of this firmware update
It has corrected the phenomenon 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.

SIGMA Optimization Pro Download page
http://www.sigma-global.com/en/download/lenses/sigma-optimization-pro/

For further assistance please contact Sigma Imaging (UK) Ltd Service Department by emailing service@sigmauk.comor telephoning 01707 329 999

We appreciate your continued support for our company and products.