paul_serafini1 Posted August 9, 2008 Share Posted August 9, 2008 Sorry for the rather elementary question, but this is new to me. I'm using my two ex580II's for a portrait set up. I have one on the camera, and one on a light stand. They're both set on Manual. I'm using a sekonic 358 to set my flash output. I have made my own sync cord to get the flashes to fire test flashes from my model. Here's my question; my sync cord works fine for the flash which is off camera, but not on the flash which is on camera. When I take that flash off camera it works fine. WHY? Link to comment Share on other sites More sharing options...
mark u Posted August 9, 2008 Share Posted August 9, 2008 How are you connecting the sync cord to the flash? Link to comment Share on other sites More sharing options...
paul_serafini1 Posted August 9, 2008 Author Share Posted August 9, 2008 the 580II has a pc connection, as does the sekonic. I made my own pc sync cord with two female plus. for the record, i also tried plugging the sekonic into the pc on the camera. Link to comment Share on other sites More sharing options...
zml Posted August 9, 2008 Share Posted August 9, 2008 AFAIK once you mount the 580 on-camera (hot shoe), the PC connection is disabled. Link to comment Share on other sites More sharing options...
paul_serafini1 Posted August 9, 2008 Author Share Posted August 9, 2008 One more follow up...I just discovered that the sync cord works just fine, even with the on camera flash, if the flash is not set to wireless shooting (i.e. is not set as a master or a slave). Also, for the record, I have the sekonic set on corded flash. Link to comment Share on other sites More sharing options...
greg_moss2 Posted August 9, 2008 Share Posted August 9, 2008 Just a guess, the 580EX II probaby has a safety switch to disable the PC input when mounted on camera. Don't try the Sekonic plugged into the camera. The sekonic and the camera are both outputting about 6 volts when you trigger. I have read somewhere that the 580EX II PC connector only can be used as an input, not an output. Try using both flashes mounted. One just above or beside the camera position. Link to comment Share on other sites More sharing options...
zml Posted August 9, 2008 Share Posted August 9, 2008 <i>if the flash is not set to wireless shooting </i><br> Guess you have answered your own question. <br> I've dragged out my 580 II, tested your setup, and yer right: can't pop the flash with a meter attached to the PC contact if the flash is set for wireless shooting. Link to comment Share on other sites More sharing options...
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