Question about Promaster 7500DX for Canon TTL Flash

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Lock disc mechanism stuck

Hello! I have been using the promaster 7500dx digital flash with my Canon Digital Rebel XT/EOS 350D camera. The problem I am having is that the round disc mechanism that locks the flash to the camera seems to be stuck, and I can't get it to budge. I took some pictures with it last night, but I was constantly having to make sure it didn't fall off the camera. I can't secure it totally or get it to move. Please help!

Thanks so much.

Diane

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Try to put some silicone oil to the thread the disc is turning on. The oil slowly penetrates into the gap and lets the disk rotating. Car dashboard shine sprays often contain silicone oil, check the ingredients.
Laszlo

Posted on Nov 14, 2008

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