We’ll examine each of the settings available under the
Commander mode. TTL is the easiest to use since it allows
you to set exposure compensation for the built-in flash as well
as each of your flash groups. Next, we’ll look at M mode,
since that gives you fine control of your flash from full-power
(1/1) to 1/128 power. We’ll briefly look at AA mode. Then
finally, we’ll consider the - - (double-dash) mode, which
prevents the camera’s built-in flash from firing the main flash
output but does not stop the necessary monitor pre-flashes,
nor the firing of the external flash units.
Figure 12-10. Commander mode setup screens
When your camera is controlling external Speedlights using
its built-in Commander mode, you must always raise the
built-in flash on your D300(S). The camera communicates
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