Here's some information I picked up from another forum:
first some links:
http://www.shortcourses.com/choosing/sensors/05.htm
http://astrosurf.com/buil/d70v10d/eval.htm
and here is what some people had to say
quote:
while the Nikon D70 may take a slightly sharper pic. The EOS 300D gives a smoother image at ISO100, less noise. Also the D70 applies post image processing that may be detrimental for deep sky imaging in addition to dark frame subtraction
unquote
BTW the guy who made this comment had pictures published in Sky and Space-last issue
and
quote:
net result looks like the D70 is more sensitive but gets bogged down in its internal processing, so one has to look at the trade-offs and accept the fact that the Canon is best-net-result-wise.
unquote