On Mon, 17 Jan 2005 12:22:41 -0800, paul <net> wrote:

Yes it does.

If it was a long exposure it did. If short, it did not.
Dark Frame Subtraction is not the same as software noise reduction and
is an entirely different process. It removes the individual pixels of
noise. How it handles replacing each of those individual pixels can
be done a number of ways.

The simplest would be to take each pixel removed and replace it with
an average of the 8 surrounding pixels. It could also perform a fast
Fourier transform, but probably doesn't have the computing power.

comparing RAW and JPGs in apples and oranges. I'd at least compare
RAW and TIFFs.

At normal exposures and ASA you shouldn't even be able to see the
difference. Dark frame subtraction is for long exposures.

Sharpening does not get rid of noise! It emphasizes differences and
that means it will emphasize the noise.

But...pasting the RAW on top of the jpg? Why do things the hard way?
If you have RAW, convert to TIFF and do your processing. THEN change
it to JPG if you feel the need.

Working with out and out RAW images is not for the faint of heart and
can be discouraging for the beginner. If the information is there as
it is with the NEF, photoshop CS will give you control of the
conversion to TIFF and a real head start to saving a lot of work..

Noise reduction does that.

It's a steep learning curve.
Nikon Capture is not one of the best programs out there for one.
If the noise is due to long exposure you aren't likely to find a
better way of elimination than dark frame subtraction.

It just occurred to me to ask if you are shooting in the NEF/JPG mode
where you get both an NEF and JPG? If so those are not full resolution

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)