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  1. Hello everyone and anyone, I am desperately in need of assistance. I have been shooting underwater for years, but not with strobes. I have a trip coming up very soon and I have purchased an old Ikelite Substrobe 100 and an A35. The A35 I realize is only optical, not a problem. I purchased a used cord for the Ikelite 100 to connect to my Canon G12's Ikelite housing and it won't fire through the hotshoe connection. I have gone through troubleshooting everything I can think of. I tested the cord, and it will fire the strobe. I have even put the hotshoe connection on my 5dmk3, and it will fire the strobe. It is just the G12 that isn't firing the strobe. I'm praying that someone has had this or a similar problem and knows what I'm doing wrong, or what needs to be done to fix it. Below are some other things I have tried. Cord works at both ends, and strobe can be triggered all the way into the case. Tested using a paper clip and touching the correct terminals. So, connections are good all the way from the flash to the inside of the housing. I read things that suggested that some older strobes can't do ttl. So, I wondered if that was the problem and they suggested placing electrical tape over the connective parts and seeing if that works. I couldn't get that to work. I may be taping off the wrong parts or that may not be the issue. My canon G12 hotshoe works fine. I can place a Canon 600 EX-RT on top of it and it fires fine. (The nice camera and flash are my work equipment, not mine. If I could afford all of that, I could probably afford new strobes rather than old used ones. ) If anyone has any advice at all, I greatly appreciate it. If I can't get this to work, then I may have to just rig up something to block the on camera flash and try to just use the A35. If the Substrobe 100 is not compatible for some reason, is there a way to remove the port from that and attach it where the optical port is on the A35? Thanks in advance!!! Aaron
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