Hi!
I, too, have a Scan Multi II and can tell you that the multipass scanning
makes a significant difference when scanning overexposed negatives or
underexposed slides. The difference is in the noise level of the darkest
portions of the slide or the lightest portions of the reversed negative
(often the sky--- perhaps the cause of the sky grain we were seeing talked
about last month?)
With viewscan, you can multipass at least 128X (I've done it!) and
certainly, the difference between 1 pass and 16 passes is remarkable. 128
passes may be overkill (and it takes most of a night as well, at least in
medium format!)
You won't see much benefit to multiscanning on a properly exposed film,
though....
Hope this helps!
Guy Clark
> -----Original Message-----
> From: Jim Karr [SMTP:[EMAIL PROTECTED]]
> Sent: Friday, October 06, 2000 10:33 AM
> To: [EMAIL PROTECTED]
> Subject: RE: Vuescan6.2 and Minolta Dual Scan II
>
> > > A couple of questions-
> > > 1. Why do multiple scans improve shadow detail- I assume
> > > that it is signal averaging. Does it effect
> > > resolution with image shifting between scans?
> >
> > I was intending on downloading VS6.2 to my office computer today,
> >just so I could study the help file. I do remember it stating some
> >scanners were capable of single-pass multiple-scanning, and other
> >would need to do multiple passes. The latter would need perfect
> >registration for each pass, otherwise leading to your suspected
> >problems.
> >
>
> I'm using a Multi II, while not a Dual II it pretty much has the same
> features. When doing a multipass scan I can't notice any difference in
> the
> image quality even when doing a 16x mutlipass scan.
>
> Jim Karr
> Karr Photography, LLC
>
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