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RE: filmscanners: Scanner resolution (was: BWP seeks scanner)
> Just for clarification. You are speaking of the Minolta Dimage Dual,
> which is rated at 2450 or so DPI, not the Dual II, which is rated at
> 2820... is that correct?
>
> Art
>
> Shough, Dean wrote:
>
>
> >
> > This is a very small snippet of a scan taken with my Minolta Scan Dual
> from
> > the 1951 Air Force test target. The Target is chrome on glass with a
> > maximum resolution of 228 lpm. The maximum resolved pattern is group 5,
> > element 5 which has a resolution of 50.8 lpm = 1,290 line pairs per
> inch.
> > Various artifacts appear when trying to image the targets finer than
> group
> > 5, element 1 (32 lpm).
>
Correct - I have the original SCSI scanner rated at 2438 dpi. The
theoretical resolution of this scanner is 48 lpm. The apparent resolution
in the scan of 50.8 lpm is due to alaising.
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