I just got a 7D and have been testing it out. One thing I have noticed is some pretty severe banding even at ISO 100. The attached photo is a 100% crop shot at ISO 100. I shot it raw and opened it in lightroom 3 with just the default settings (no change to exposure, fill light, recovery, black point, contrast, etc).
I might expect something like this at ISO 3200 or 6400... but 100?
(In case it's not obvious, I'm looking at the discolored band in the midtones that runs along the shadow to the left of her face)
Also, the noise in out of focus areas is very large and blotchy, like an oil painting or something. I see this at pretty much all ISO settings. This really doesn't seem right. Did I get a lemon?
Thanks in advance for any suggestions.