Archived posting to the Leica Users Group, 1998/08/07

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Subject: Re: [Leica] Strange thing with Leica R Circular Polarizer filter
From: "Robert G. Stevens" <robsteve@istar.ca>
Date: Fri, 07 Aug 1998 16:31:19 -0300

Pascal:

This was probably oxidation of the aluminum.

Robert

At 06:27 PM 8/7/98 +0200, you wrote:
>A strange thing happened with my new Leica Circular Polarizer filter (for 
>55mm lenses).
>I had mounted the filter on my Macro-Elmarit-R 60mm f/2.8 for three weeks 
>long while on holiday, and today when I removed the filter, I noticed 
>that there was something white on both the lens barrel and the back of 
>the filter where it screws on the lens barrel.
>First, I was afraid that the filter had scratched the lens barrel and 
>removed some of the black coated finish on the lens, but after inspection 
>it appeared to be only some kind of white cream that could easily be 
>removed with a cloth from both lens and filter.
>I have never seen this kind of behavior before. Anybody has any ideas?
>Thanks.
>
>Pascal
>
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