Chris Beaumont wrote:
The 30D files certainly clean up pretty well from a chroma point of view, but my 40D displays significantly less luminance noise, which is far more important (in my opinion) as chroma is very easy to fix without detail loss.
My 40D (processed in Cap One 4 or Raw Therapee) has less - and finer-grained - Luma and notably less Chroma, than my 30Ds: if the 7D is as good as or better than the 40D (and first impressions are very positive) then bring it on.
One thing about higher density sensors and noise - as I mention above - (comparing 30D to 40D files really brought this home for me) is that Luma will be much finer, other things being equal, which makes it much less obtrusive.