Archived posting to the Leica Users Group, 2007/03/27

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Subject: [Leica] Film/Digital
From: red735i at earthlink.net (Frank Filippone)
Date: Tue Mar 27 12:52:23 2007
References: <23445.26730.qm@web34205.mail.mud.yahoo.com> <EFB2C509-43ED-43DD-91B4-1A547118AFA8@btinternet.com> <20070327100748.9F2512FBBF@donald.hostspirit.ch> <03bc01c77081$67490800$35db1800$@net> <20070327152751.E29492FC79@donald.hostspirit.ch>

Interesting arguments....  I am not sure I agree with him in the basis that 
film chemistry is a binary relationship... either black
or white, whereby the clumping them gives one shades of grey by the 
proportion of black to white in the clump.  But I do see the
rationale in his arguments.  I guess I see film as an analog product with 
the individual clumps being shades of grey.  The clump
size is the first issue... how big is a film clump?   I have never seen this 
printed, but I bet the guys at Kodak know off the top
of their hats.....

 What I do find is the fallacy that digital sensor elements are 6 microns in 
size..... he does not mention that it takes 3 ( 4?)
elements to represent a pixel location, and there is space between the 
sensor elements... giving the area of a pixel to something
like 6u* 3 pixels + something for space.....  bigger than he claims for 
film.....

Interesting analysis......

Me too on the film testing stuff..... hate it.

Frank Filippone
red735i@earthlink.net 


http://www.luminous-landscape.com/essays/clumps.shtml 

Didier





Replies: Reply from Frank.Dernie at btinternet.com (Frank Dernie) ([Leica] Film/Digital)
Reply from tedgrant at shaw.ca (Ted Grant) ([Leica] Film/Digital)
In reply to: Message from leicam4pro at yahoo.com (Photo Phreak) ([Leica] I'm blaming Ted!)
Message from Frank.Dernie at btinternet.com (Frank Dernie) ([Leica] I'm blaming Ted!)
Message from leica at screengang.com (Didier Ludwig) ([Leica] Film/Digital (was: I'm blaming Ted))
Message from red735i at earthlink.net (Frank Filippone) ([Leica] Film/Digital (was: I'm blaming Ted))
Message from leica at screengang.com (Didier Ludwig) ([Leica] Film/Digital)