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Matt OHarver wrote: ...I've got PW plus III's and PW plus II's and when I mix them in the studio I have to limit my shutter speed to 1/200. However when I take my PW Plus III's out of the equation and just use the PW plus II's I can go all the way to 1/250 the sync speed of my D4. ...Is there a reason that adding the PW Plus III's would cause this issue? I thought they were all backwards compatible?
They are backward compatible in that they'll send and receive on the same channels, etc., but the III seems to have a bit more propogation delay to the signal. Added to the "just barely within sync" 1/250 shutter of the full-frame D4 it adds up to more than can work. (It's even worse with Canon's full-frame 5D series.)
You might get it to work if you use a Plus II as the transmitter, and use the Plus IIIs only as receivers.
If that doesn't work, the next option -- which may be worthwhile in any event -- is to pony up for a MiniTT1 transmitter. It's not an inexpensive device, but you get the advantage of Pocket Wizard's HyperSync shutter-timing optimization, which should allow you to dial in timing adjustments to get you 1/250 and even higher with your Alien Bees gear. (Some people aren't aware that while HyperSync requires a TT1 or TT5 transmitter, it will work with TT5, MultiMax, and Plus receivers.)
Thanks Brian. I'm going to put the Plus II's as the transmitter and put both of the Pluss III's I have in RX mode and see what happens tomorrow. I bought two more Plus II's and may just end up selling the Plus III's. While they give me more channels they have also brought on some headaches. I've never noticed this on location where I just use the Plus III's with one light off camera, but any time I mix them it does.