Archived posting to the Leica Users Group, 2000/03/10

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Subject: RE: [Leica] for sale as a result of our studio going digital
From: Austin Franklin <austin@darkroom.com>
Date: Fri, 10 Mar 2000 19:31:51 -0500

> One CD holds the equivalent of three rolls of 120 film.

That is an unqualified statement.  It depends on what resolution you are 
talking about.  Film will have FAR more resolution than any scanner you can 
use today, so you actually have more 'information density' on film than you 
do a CD.

If you believe film has, say 4000 pixels/inch, that would be a file of 4000 
x 2.5 x 4000 x 2.5 x 3 bytes per image.  That equals  300,000,000 bytes per 
image.  That would be two images per CD....which makes film clearly the 
'information density' leader...

Obviously, if your needs are for much lower resolution, the data size goes 
way down, but than why would you use medium format in the first place?

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