The 2700dpi Nikon LS2000 I own (around 3800pixel horizontal) is sure not
enough to resolve a slide which containing fine details. If the SprintScan
4000 can provide "true" 4000dpi, then I think it is good enough for 35mm
film.
Few months ago I visited Polaroid and tried a scan at 4000dpi, I back home
and scanned the slide with my old LS10 (which is a bit sharper then the
LS2000) I scale up the LS10 scan by software and compared the one from
SprintScan but I can hardly find out any different (or only very little
difference). I am quite disappointed about the result, but I will take
another RVP slide with very fine details to try again.
My Polaroid Propalette 8000 can output film up to 4x5" (an optional film
back is needed) I think which is necessary to have at least 8000 lines
output. For 35mm I think 6000 lines is needed for high quality output.
8000 lines is only around 5600lpi, most or all professional drum scanner can
go over 10,000lpi. Slide outputs are normally not for colour separation
printing. If you got a file, you can make the colour separation, no need to
output to film, film output is mainly for slide projection or traditional
photo printing.
C.H.Ling
>As for the scanners, I suspect the one I own (the Polaroid SprintScan 4000)
>is already pushing the practical limits of most films -- in many instances,
>I can already resolve *grain* in the film, leading me to believe that 4000
>lpi (approx. 158 lpmm) is about as much as you could ever usefully use.
>
>I'm surprised that any additional info would be available at 8000 lpi --
>even drum-scanned output doesn't normally go that high, and that allows for
>extremely high resolution four- or seven-colour separations and printing.
>
>Garth
>
>
>
>"A bad day doing photography is better
> than a good day doing just about
> anything else."
>
>The Unofficial Olympus Web Photo Gallery at:
>
> http://www.taiga.ca/~gallery/
>
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