--- Bob Talbot <[EMAIL PROTECTED]> wrote:
> The ONLY reason it does not lose any information for such an
> apparently big saving over TIFF is that the *information* never
> existed in the first place.
This is not the only reason. Most *.tif files do not contain compressed
the data, unless you used LZW. The raw format, unlike nef, does
compress data. So you get an even smaller file size then if you had
just droped the pixel values that didn't exist anyways.
Also AFAIK the D30 only allows raw, jpeg fine, and jpeg normal with 2
different resolutions for jpeg. jpeg does allow only 8-bit input
samples (for baseline). But the D30 has 12bit/channel, I believe. So by
using jpeg instead of raw you lose 4 bits. The camera might make
already some adjustments and take advantage of the 4 bits but certainly
not to an extend as you could in a software tool on the computer. This
is another reason not to use jpeg if you want to get the best out of
your D30. This of course assumes that the conversion of raw to
[tiff|psd|..] keeps all 12 bits or at least allows you do adjust
curves, etc before converting it to the new format. How does that
actually work with the D30?
> But you have to make up the missing colur info somewhere
> ... it just seems more sensible to do it in a computer where disk
> space is cheap than in a camera where it is always a compromise.
In addition to that you probably could implement more sophisticated
algorithms to interpolate the missing colors on a PC then in the camera
itself.
Robert
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