Archived posting to the Leica Users Group, 1996/10/09

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To: leica-users@mejac.palo-alto.ca.us
Subject: Re: M3 and Summicron 50, production differences
From: John Van Stelten <focalpt@ecentral.com>
Date: Tue, 08 Oct 1996 14:52:34 -0600
References: <1.5.4.32.19961008133620.0072ab74@roanoke.infi.net>
 
Marc,

You are absolutely right about the rangefinder yellowing, coming from 
deterioration of the cement.  The M-3 has a beamsplitter that is a split cube 
and cemented to the front is a minus lens and on the side there is another plus 
lens cemented there.  Since these early rangefinders were cemented with 
balsam, they have a tendency (with age) to crystalize,giving a yellowish hue. 
Since there are three different cemented surfaces this can really affect the light 
transmission.
I also agree about Bob Shell, when I see his photographs, it reminds me of 
what Victoria Secret might look like with a $100 budget.

John
In reply to: Message from Marc James Small <msmall@roanoke.infi.net> (Re: M3 and Summicron 50, production differences)