Flash custom setup
In the Custom Settings menu, the Bracketing/flash sub-menu enables you to change many options…
e1 Flash sync speed
Also known as Auto FP mode, this setting enables you to remove the flash speed limit on your camera. Set the camera to the highest shutter speed setting with Auto FP by it. On many cameras this is 1/200 (Auto FP). Set this once and there is no need to revisit this menu setting.
e2 Flash shutter speed
This option determines the slowest shutter speed available when using front or rear-curtain flash or red-eye reduction in P or A shooting modes. The default is 1/60 sec
e3 Exposure comp. for flash
Determines how the flash level works when exposure compensation is used. It’s not usually changed unless you have a specific creative intention in mind.
Entire frame: Will adjust both the flash level and exposure compensation to modify exposure over the entire frame.