I've been having some issues with my 600 RTs not firing consistently. First shot or two fine, then nothing, then fires, then nothing. Half the frames are black and I'm missing poses.
At first I thought it was a problem with the ST-E3 burning through batteries, but putting fresh batteries in did nothing. I thought maybe something was overheating, but that doesn't seem to be the case either.
Now I'm pretty sure that it isn't the ST-E3, but that it is just waiting for the 600 RTs to recycle. I always use battery packs on the speedlites and before the last shoot I checked all my Enloops and they were at least at 80% capacity. (I recharged any that were below 80%).
Now, I'm checking the manual and I see Custom Function 12 -- which switches the recycling over to the battery packs exclusively.
Wondering, will I have better luck with CF12 or will that make it worse? Do I really need to top off all the batteries before every shoot. (With battery packs we're talking about 60 batteries). Anything I've overlooked? Anyone else ever have this issue?