Quote: Deni, are you referring to the Digital Concepts flash in your signature?
yes I am.
Quote: Are you sure it's really P-TTL?
It has be. It does underexpose by about half a stop but it is consistent. If it wasn't pttl it wouldn't be consistent.
Quote: You may just have to use exposure comp
I'm doing just that, but sometimes it'll underexpose massively even if I dial +2ev. I don't know if it's a problem with the flash or the batteries. I'm using eneloops.
Quote: shoot in auto mode if the flash has a sensor
I haven't found an auto mode so I guess the flash doesn't have a thyristor sensor.
It can go manually to 1/16, 1/8, 1/4, 1/2 and full power manually though.