From: Bruce Walker
I would offer that for most folks there is "good" and "bad" noise, or
more aesthetically pleasing noise anyway. When I was shooting with the
K100Ds I was almost obsessed with removing noise. But I really
disliked that camera's noise as it consisted mainly of repeated
coloured streaky stripe patterns. It's the clearly noticed pattern
that makes it so objectionable. Even converting to B&W will not hide
it. It's just fugly.
The K20D (and newer models I believe) produce more film-like noise, ie
quite pattern-free. If you process a noisy K20D image in Lightroom you
can decide how much to trade-off that noise against relative
sharpness. At high ISOs (3200) objectionable colour noise starts to
appear but is removed completely by Lr's NR filter. Just crank it to
100 and you're good.
BTW, if I had taken another shot of this on a tripod, you'd see just
how shaky and blurred it is. This was hand-held at 1/40th sec. A K20D
with the DA* 50-135 on it is a pretty heavy thing to hold steady at
the best of times.
Is there a really good free-ware noise removal plugin for Photoshop CS5?
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