Archived posting to the Leica Users Group, 2000/03/17

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Subject: Re: [Leica] f2.8 90mm Elmarit (Thin) Survey
From: ceworkman@ktis.net (C. E. Workman Jr.)
Date: Fri, 17 Mar 2000 19:47:07 -0600
 
This survey is being made to determine if there is any relationship of
"fogged" 90 mm Elmarit lenses to their serial numbers/production dates.

Here's tentative results of the survey on this lens from LUG subscribers so
far:

Number of responses:  10

Serial ranges:  26572XX - 34522XX

Number of "Fogged" lenses:  3

Serial numbers of "Fogged" lenses:   27276XX, 29676XX, 32014XX

Conclusion:  There ain't none!!!!  Not enough numbers yet, and wide
separation between those numbers with the "fog" problem.

I'll be glad to keep records if more want to submit their serial numbers.
Just a thought, though.  If the "fog" problem is caused by deterioration of
some of the cements used in the lens construction, as so many think, then
atmospheric and/or storage could really be the cause.

OK, let's hear it.

Chuck