Ok, so I want to learn to use my flash to stop action, that is, simulate a super fast shutter by having very low ambient exposure, and flashing the subject with a very brief duration of light.
Are you supposed to use manual mode on the flash? Do you fire the flash at the same time as the shutter, or are you supposed to fire the flash while the shutter is open, on, say, bulb?
I have a 430 Ex II. Do we know the flash duration of the flash? Is it shorter/faster when you use lower power?
Links to information using this technique would be helpful.