"acl" wrote in message
...
SNIP
How do all the Canon cameras manage such low read noises?

http://web.canon.jp/Imaging/cmos/technology-e/noise_reduction.html

SNIP
Any idea how this can happen (except by some very effective image
processing before doing anything else to the raw data)?

There may be some specific noise suppression in the DIGIC processor as
well, but at least it is not obvious (apart from the absence of
noise).

--
Bart