Is your flash going into sleep mode? That's the only time I have seen this with mine. Once I turned sleep mode off the problem went away. If you already have it off then my next guess would be the batteries. What kind do you use?
Is your flash going into sleep mode? That's the only time I have seen this with mine. Once I turned sleep mode off the problem went away. If you already have it off then my next guess would be the batteries. What kind do you use?
Flash isn't asleep. Example happened a few weeks ago - flash (with CP-E4 battery pack) was on my Rebel XTi. Camera set for continuous shooting. Shutter button down, all of a sudden one of the shots is super-bright and then several are dark.
Since TTL seems to be only selectable as a Custom Function, the fact that I can't get back into the flash to change that CF tells me something else is going on.
I'm starting to suspect my batteries. I have about 10 sets of Impact (B&H store brand?) 2900mAh NiMH batteries and 6 sets of Sanyo Eneloop batteries. Since I "know" the Eneloops will hold their charge, I try to use the Impact batteries first. If the flash comes out of its pouch, the batteries get recharged (and a shelf set goes in). Maybe it's time to try the Eneloops as first-round batteries and perhaps ditch the Impact batteries.
We're a Canon/Profoto family: five cameras, sixteen lenses, fifteen Profoto lights, too many modifiers.
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