Welcome to the forum George,


I do not have a 7D, but I can tell you that it has many improvements over the 40D. The 7D has a much better AF system as well as lower noise at higher ISO settings. If you are looking to upgrade in a 1.6 crop body you will not regret getting the 7D. I cannot speak to the exposure issue, but I am sure many 7D owners will reply and be able to answer it for you.


If I were currently looking to replace my 50D in an APS-C sensor body, I would go with the 7D.


Chris