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I have just started working with off-camera flashes. I have two Canon 600EX Speedlites controlled by an ST-E3 transmitter. I was wondering if someone could help me out with two issues:
1. When shooting in the Manual mode (600EXs and ST-E3 set to "M"), can the flash output be adjusted EITHER by adjusting it on the two flashes OR by setting the flash output on the ST-E3? If so, what, if anything, needs to be done with the other piece of equipment?
2. When shooting in the ETTL fully automatic flash mode, once you set the flash output for the two flashes on the ST-E3, does it matter what the flash output is set at on the two flashes (or do the flashes have to be set at full power)?
Thanks for any advice/input.
Rich
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