Thanks for the tip about using Average vs Evaluative mode. I'll give that a shot. I'll also chime in with Canon. If they get enough feedback from unhappy customers, they'll be more inclinded to provide a fix. Other than this issue, the 70D's a wo...
I've gone round and round with Canon on this problem. It was escalated to their engineering group. I sent many examples of the problem with simple instructions on how to duplicate. They did duplicate it, and responded, basically, that this is the ...
Thanks bobnburton for all your diligence on this. Has there been any resolution on this issue? I am experiencing similar symptoms on my 70D with 580exii. The underexposure happens with any type of flash modifier (bounce, softbox, etc). I'll get a go...