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Re: filmscanners: Scanner resolution (was: BWP seeks scanner)
Paul Chefurka wrote:
>
> After all, 4000 ppi gives a resolution of 75 lp/mm or so, and it takes pretty
>remarkable
technique to actually get that kind of resolution onto film. Or is my crude
first-approximation
assessment incorrect, and we actually can't resolve detail in the scan at more
than half that -
say 40 lp/mm with reasonable contrast? Even that level is still sufficient for
prints that
appear "sharp" at normal viewing distances.
>
I think there are two issues here. One is that a 4000 dpi scanner
doesn't capture 4000 dpi, and I've yet to get a straight answer on what
they actually capture.
Secondly, the nature of the CCD sensor is that of a soft edged scan due
to a number of aspects of the nature of these chips, so you might be
right that using current technology will not allow for much improvement.
Art
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