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filmscanners: 2700ppi a limiting factor in sharpness?

Winsor wrote:
>It seems to me that the 2700 dpi is the limiting factor.  Rather like 
>the old joke about the senior citizen stereo sale special.  Doesn't 
>matter much how good the speakers are if you can't hear them.

No, I don't think so.  I've tried scanning a few of my slides on a Polaroid
SS4000, and the amount of extra information seems small.  There's more pixels,
but there doesn't seem to be much difference between a 2700ppi scan resampled
to 4000dpi and the 4000dpi image.  The Sprintscan can get more shadow 
out of a slide, but that's dynamic range, which is a different issue.  A
very sharp image on the film will give a sharper scan - garbage in garbage
out obviously applies.

I'm not saying that a higher resolution or dynamic range scanner would be
a bad thing.  I'm simply saying that the scanner can't fix problems with
the source.  If all my photos were equally fuzzy, I wouldn't know what I
was missing.  But the ones taken with prime lenses are significantly sharper
(duh on my part).


Rob Geraghty harper@wordweb.com


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