Archived posting to the Leica Users Group, 1998/12/31

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Subject: Re: [Leica] RE: Scan's
From: George Hartzell <>
Date: Thu, 31 Dec 1998 23:39:29 +0100 (CET)

Mark Rabiner writes:
 > Eric Welch wrote:
 > > Negative films can be worked up in Photoshop easier than slide films.
 > > Kodak's scanner does pretty good with Kodachrome when you use the latest
 > > driver. And the brilliance of slides on a projector screen cannot be
 > > matched by the web, but the glowing phosphor of a computer screen isn't
 > > that bad.
 > I think Ansel Adams wrote that the luminance ration on a projected slide
 > is 200/1, 
 > glossy print 50/1, 
 > mat print 10/1.
 > I wonder where a computer screen fits into that.

Philip Greenspun, proprietor of, says
( that for monitors:

   Contrast ratios between 100 to 1 and 170 to 1 are therefore more


   High-quality black-and-white photographic prints have a contrast
   range of about 100 to 1.