I used a 5D mk ii for work, and I noticed the corporate portraits I took before the weekend had some banding in one of our staffs sweaters in the darker portions of the image.
I was shooting RAW, but somehow, probably one of the other photographers, set it to sRAW. A little research and I found that that is the culprit.
Shoot in just RAW, and it should resolve the issue. It is a problem that Canon acknowledges in the 5D MK ii cameras. >>3101552>why is my camera malfunctioning?>buy a better camera
How is the fifth grade working out for you?