Archived posting to the Leica Users Group, 2001/05/13

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Subject: RE: [Leica] Cleaning slides for scanning
From: leica@davidmorton.org
Date: Sun, 13 May 2001 23:28:07 +0100

Mark Rabiner wrote

"In the 17.5 months I've used my LS-2000 Nikon scanner I've not once gotten
ICE
to work for me.
The fact that i shoot 90% black and white 9% Kodachrome and 1% E6 might have
something to do with that."

That's to be expected. ICE works by measuring transmission through the film
in the IR region. The dyes in colour slide films are transparent at the IR
wavelengths used, and the system assumes that anything it detects is dirt.
Of course B&W emulsions *aren't* transparent at IR, and so you wouldn't
expect ICE to work on B&W negs.

When set up correctly such systems work very well. When I was employed at
the BBC's R&D labs, designing CCD telecine equipment, we had this working in
real time on 16mm and 35mm movie film in 1978, and it made a huge
improvement.

- -- 
David Morton
dmorton@journalist.co.uk

Wapingapo fahali wawili, ziumiazo ni nyasi