tim wrote in post #9207526
Um, you're using it wrong. You need to understand flash metering, it's not a point and shoot.
Do you own a 5dmkII?
Google "5dmkII undexposure" and you'll hear alot of people with the identical behaviour as mine. I've only experienced using a xti, 40D, 50d, T1i, 5d classic and now 5dmkII. The 5dmkII reacts differently compared to all of the other bodies I've owned and used. All of the other bodies mentioned will not underxpose in "Flash Exposure" with a flash FEC setting of +1/3 (example: f/5.6, 1/125, ISO 400 indoors with low cielings) With the 5dmkII it will require 2/3 to +1 FEC to prevent underexposure. I PM'd Bodank and Wim (in Netherlands) and their 5dmkII's exhibit similar behaviour. And they must bump up the FEC more than other bodies.
If your flash is the only source of light with little ambient the 5dmkII seems to behave differently.
Tim, I understand flash metering. Read other "owners" of the 5dmkii and they will also confirm this behaviour.
Using ETTL-II "Average" isn't the silver bullet as someone mentioned on the net. It does behave similar to what I am use to when I bounce flash.
Tim please test drive a 5dmkII before making comments on "point 'n shoot" mentality. Those comments appears abrasive/pompous but I actually fell of my chair laughing.