Manual flash power level control, Auto power-off function prevents power waste, Regular firmware updates – SIGMA EF-630 Electronic Flash for Cameras User Manual
Page 4: Flash usb dock fd-11

* AF assist light is not available with some camera models.
Manual flash power level control
The flash power level of the EF-630 can be set manually from 1/1 to 1/128 to meet the photographer’s
needs.
Auto Power-Off function prevents power waste
To conserve battery life, the EF-630 will automatically turn off after a certain period of time of
non-operation.
Regular firmware updates
Photographers can update the firmware via the newly developed optional FLASH USB DOCK FD-11
(sold separately). The firmware can be updated by attaching the EF-630 to the FD-11 and then
connecting the FD-11, via a USB cable, to a personal computer on which the latest version of the
exclusive software SIGMA Optimization Pro has been installed.
[Optional Accessory]
FLASH USB DOCK FD-11
This accessory is used to dock EF-630 and update its firmware in
the exclusive SIGMA Optimization Pro software. The dock can be
connected to a personal computer via a USB cable.
Barcode:
SIGMA 0085126 801564, Nikon 0085126 801557, Canon 0085126 801540
*Release date of Nikon and Canon: TBD