3Setting the FlashN
When using second-curtain synchronization, set the shutter speed to 1/25 sec. or slower. If the shutter speed is 1/30 sec. or faster, first-curtain synchronization will be applied automatically even if [Second-curtain synchronization] is set.
With an EX-series Speedlite not compatible with flash function settings, you can only set the following: [Flash firing], [E-TTL II meter.], and [Flash exposure compensation] under [External flash func. setting]. ([Shutter synchronization] can also be set with certain EX-series Speedlites.)
If flash exposure compensation is set with an external Speedlite, you cannot set the flash exposure compensation with the camera. If it is set with both the camera and external Speedlite, the Speedlite’s setting overrides the camera’s.
