Quote:
Originally Posted by roncgizmo
John, I thought if I turn off the red eye I can get but that. am I wrong?
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Alas, yes, you are: the Canon ETTL system works with a very short pre-flash, with which the camera/flashsystem determines how much light to shed/when to turn the power off, immediately followed by the main burst.
A non-suited optical slave will pick up the pre-flash, and thus unleash it's power too soon...
If you do this in a studio setting, you might be able to first cock off the preflash by pressing the * button, and then wait for the 540ez to regain posture and reload, and then take the actual shot ??...
...€0.02...
Kindest regards!
Max@Home