Canon SPEEDLITE EL-1 Advanced User's Manual page 99

Shutter synchronization
You can select the flash firing timing / method from [First-curtain synchronization],
[Second-curtain synchronization], or [High-speed synchronization]. To perform
normal flash shooting, set [First-curtain synchronization].
Flash exposure compensation
With a similar procedure as exposure compensation, you can adjust the flash output.
The flash exposure compensation amount can be set up to ±3 stops in 1/3-stop
increments.
Flash exposure bracketing
You can take three shots while automatically changing the flash output. The settable
range is up to ±3 stops in 1/3-stop increments.
Clear settings
When [Clear flash settings] or [Clear settings] is selected, you can revert the settings
of the flash to their default settings.
Caution
If the flash coverage is automatically set such as when the bounce adapter is
attached or the wide panel is used, setting [Flash zoom] (flash coverage) is not
possible.
Note
[Built-in flash firing] and [E-TTL II meter.] are displayed in step 2 or step 3 in the
"Flash Function Settings" (Display layouts and procedures vary by camera model).
When the flash exposure compensation is set on the flash, flash exposure
compensation cannot be performed from the camera. If both are set at the same
time, priority is given to the setting on the flash.
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