Quote Originally Posted by Sean Setters View Post
Yep, this is a great answer. Basically, you're turning yourself into a programmable lightstand with remote trigger. As soon as you open the shutter, point the flash at different things and press the test fire button. Done.
I've always wondered, how much light/power output is given by pressing the test button? It certainly isn't 1/1 or 1/2, on my 430EX (mk1) I can press it a few times in a row without losing so much charge that it has to stop to recharge (battery-dependent, of course), so i'm guessing around the 1/64 mark. Can the higher-model speedlites be programmed to output a certain power from the test-button?