Archived posting to the Leica Users Group, 1997/03/25

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Subject: Re: Leica Alternatives--Fogging
From: doctorc8@stout.entertain.com (Henry Chu)
Date: Tue, 25 Mar 1997 23:03:57 -0700
 
>
>Perhaps I should clarify "fogging."  I am not talking about glass which
>is fogged over and opaque.  And I am not talking about dust or fungus.
>The condition which necessitates cleaning, costing an average of $30 or
>more per lens, is OFTEN NOT VISIBLE by simply holding the lens up to the
>nearest light or window.

Steve,

I have had two Leica lenses of late '50's vintage, a 35mm f/2.8 Summaron RF
and a 50mm Summicron rigid chrome, with fogging problems (be it bad
lubricant or an antiquated coating).  Of course, it was only after 35 yrs
before the problem appeared.

Henry