Ah-hah! That makes perfect sense. The speckles are too bright and pure to come from
the film itself. It's reasonable to assume they're an electronic artifact, and
aliasing is the likely culprit. That also explains why boosting the black point will
reduce them but not eliminate them. They're so bright that you need to throw away a
lot of shadow detail to hide them. Thanks, Tony.
That still leaves the question of what to do about them - short of waiting for a 6000
dpi scanner, of course.
Paul
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Thursday, August 02, 2001 12:18 PM
To: [EMAIL PROTECTED]
Subject: RE: filmscanners: Supra 400 shadows
On Wed, 1 Aug 2001 11:44:30 -0700 Paul Chefurka
([EMAIL PROTECTED]) wrote:
> I have the exact same problem with Supra 400 - red and green speckles in
> the shadows. Like you, I can't get them to disappear without blowing
> away a lot of shadow detail. I don't know if a drum scan would solve
> this or not - I've seen the same problem on both my SS4000 and my new
> LS-4000, so I have my doubts.
This is likely to be grain aliasing. Where exposure is slight, there aren't
many dye clouds (grains), and if they are of a size to alias individual
pixels or small groups, false colour is the outcome.
Regards
Tony Sleep
http://www.halftone.co.uk - Online portfolio & exhibit; + film scanner info
& comparisons
