Noise is not usually a major problem on my 1Ds3
but the occasional images throws some up or of course if I use high iso.
I downloaded a trial version of Dfine 2.0 from Nik and, even though I have only run it one one image so far, I am almost certain I will buy it. I was staggered at how completely it removed noise (just on the default setting) without affecting sharpness of the image at all.
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Bill Allsopp
Don't just look, see!
http://www.britishlandscapephotographs.co.uk
http://www.billallsopp.co.uk