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Message: <blockquote data-quote="BenjyvC" data-source="post: 589122" data-attributes="member: 42877"><p>Okay, I found the SU-4 setting, see it works with the pop-up flash or one of the SB-700s mounted on the hot shoe, but alas not with my custom ring strobe. nickt said this doesn't work with cheap ring strobes, so I'm curious what specification is missing here. My custom strobe certainly wasn't cheap, but I struggle to see how the pulse of one strobe could be any "cheaper" from one LED to the next. We had to tune the pulse precisely to the curtain, not to get partial exposure as the curtain rises or drops, all that is working fine. What could be missing? Thanks for the input. I'm in manual BTW.</p></blockquote><p></p>