Archived posting to the Leica Users Group, 2001/01/09

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Subject: [Leica] Re: Photodo on 35mm vs. 4x5
From: Douglas Cooper <douglas@dysmedia.com>
Date: Tue, 09 Jan 2001 22:30:41 -0800

> From: owner-leica-users@mejac.palo-alto.ca.us (Leica Users digest)
> Reply-To: leica-users@mejac.palo-alto.ca.us
> Date: Tue, 9 Jan 2001 15:00:33 -0800 (PST)
> To: leica-users-digest@mejac.palo-alto.ca.us
> Subject: Leica Users digest V19 #18
> 
> 
> That's not quit what the photodo article said.  It just said that
> sharpness did not increase as much as grain decreased going small to big.


You're right:  I overstated their case.  I just reread the article.  I think
you understate their case, however:  describing the 4x5 image on T-Max, the
essay says, "This image is the sharpest one, but the difference to 35mm is
surprisingly small."  Not just relatively small, compared to grain, but
small in absolute terms.  And this is born out by the test patterns
reproduced -- the difference in sharpness is negligible, and certainly
nothing like what you would expect given the difference in enlargement
ratios.
 

Douglas Cooper
http://www.dysmedia.com