After setting white balance, the manual suggests setting Black Balance. Do I need to get a black card and fill the frame with it as I do to set WB, or can I just leave the white card in place?

Okay, I got my answer on another forum KKeller, so I thought I'd share it here. The camera closes the iris and adjusts black with the iris coses, so it doesn't matter what the camera is pointed at.

What I wonder, is why the camera doesn't set the Black Balance without my help. Hmmm.