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| p.1 #1 · Wireless ETTL2 w/Sigma DC Super 500 Flash w/Canon DSLRs |
I just purchased 2 Sigma DG Super 500 flashes for my Rebel XT. I followed the instructions for setting them up in E-TTL2 mode, making one of them the master (the one attached to my camera) and one of them the slave (the one mounted on the tripod). In this setup, I can either have both the master and the slave fire, or just the slave.
When I set the master to fire, the master and the slave both fire, but the slave's firing is so weak that it has no impact on the image. When I set the master to "off", both flashes fire, but they are both so weak that the image is not illuminated at all.
Interestingly, when I use FEL key (the "*" key on the camera to lock flash exposure) the flashes work as advertised in both scenarios, but when shooting I can't be pushing the FEL key before each shot.
Thinking that it was a broken flash, I swapped the master and slave, but the same exact thing happens.
I called Sigma US, and I had to wait for Tom, the one and only tech they have, to come back from lunch. He couldn't help me since he has neither the camera nor the flash (how can you possibly support a product you don't have on site?!). He told me to e-mail Sigma in Japan to get an answer.
I will say that the flash works fine on the camera by itself, it's just this two flash scenario that seems not to work.
Any ideas (other than 'buy Canon flashes', I've already come up with that one)?