Paul C. Buff, Inc. Technical Forum

OK I got my power MC2, have to say it works but not the ettl I was hoping for seems that when mixing in a 580ex11 on a Flex the ettl seems to not quite work. Maybe I'm using the wrong setting with the AC3 on the Mini anybody have and thoughts on this

MC2 is not and was not billed as a TTL device. There are currently no TTL capable studio flashes on the market. Likely, you are getting an overexposure with the TTL flash and E640. This is due to the flash and camera not knowing that an non-dedicated flash is joining the party. For specific set ups or trouble shooting, please contact Pocket Wizard, as they have the full developmental experience with all (most) camera flash combinations.

http://www.pocketwizard.com/contact/inquiry/

OK I understand the Ettl part but I am having issues with system with the Einstein lights I have. I have the older ones I haven't gotten the email yet to replace them so is it an RF problem that I might be having as the problem seems to get worse as the power of the light goes up.

Early iteration E640's can very much affect performance. You will need to contact customer service for informarion about the trade in.