dennis osipiak Posted June 27, 2007 Share Posted June 27, 2007 On various occasions, each of my 580ex canon flashes "buzzes and stays lit" for a second or two. Flash works as expected before and after some of these ocurences, but it has me worried..is the flash or the hotshoe lead (off camera hotshoe cord) short circuiting? Is it the camera hotshoe connection ..which I've heard sometimes loosens up? (although a loose connection would prevent firing, not the reverse of staying lit for a second or two.) I haven't had the time/patience to try different camera/flash combos because the problem may happen only once in 200 exposures and I have quite a few camera bodies (20d's and 30d's) Besides worrying about flashes going bad at a lousey time, I'm also worried about any ETTL curcuitry that may be affected whether in the camera or the flash head. Has anyone had this happen before..any thoughts? Dennis Link to comment Share on other sites More sharing options...
beauh44 Posted June 27, 2007 Share Posted June 27, 2007 Hi Dennis, It's not possible you're accidentally pressing the DOF preview button on your camera? I ask because when you do your flash behaves the way your describe - Canon calls it their "modeling light" feature but I usually find it rather annoying. Just a thought - good luck! Link to comment Share on other sites More sharing options...
jnicholson Posted June 28, 2007 Share Posted June 28, 2007 Yep, I agree with Beau 100%. Link to comment Share on other sites More sharing options...
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