ETTL & flash exposure compensation

Started Feb 11, 2013 | Discussions thread
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Izabelle New Member • Posts: 17
ETTL & flash exposure compensation

Hi all,

I understand that ETTL means a pre flash is fired to determine the correct output the flash should emit.

BUT i use both the 430II and the 600ex, and i never see a pre flash fire.

I ALWAYS use flash exposure compensation - like the freedom of adjusting the output myself. Does this automatically mean that a pre flash doesn't fire, because the output is never set to 0?

I'm a little confused here!

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