[filmscanners] Kodachrome green / scanner colorimetry

["HPA" <tom@historicphotoarchive.com>]

I scan mostly old Kodachromes from before 1960.  VS generally gives much
better shadow detail than Silverfast or Insight.  I cannot begin to match
shadow detail with the other programs, so I rarely bother trying anymore.

However, I had a slide which came out with a weird color cast in VS that I
could not fix, and still can't.  The slide is rather dark and shows Nat King
Cole addressing the Republican National Convention at the Cow Palace in
1956. It scans with realistic color in Silverfast or Insight, but I cannot
get the shadow detail where it needs to be with either of those programs.
Anyone figure out how to get underexposed slides to scan with Silverfast? I
paid for the upgrade last fall so I have a fuller version, although I don't
have the upgrade that came out last month.  With VS, nothing will get rid of
the overwhelming yellow cast.

That said, VS out-performed either program with such powerful results that I
use VS for 100% of my slide scanning at this time.  I do notice better
greens with Silverfast, but the loss of shadow detail is unacceptable.

Tom Robinson

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