Archived posting to the Leica Users Group, 1998/03/26

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Subject: Re: [Leica] At what altitudes is it adviseable to use an UV filter?
From: Jim Brick <>
Date: Thu, 26 Mar 1998 23:23:05 -0800

1983, document is part number 111-152, followed by (920 083). Also in
Gunter Osterloh's book "Applied Leica Technique", page 193, first paragraph
states the same thing. Published 1984.


At 09:47 PM 3/27/98 -0600, you wrote:
>At 08:08 AM 3/26/98 -0800, you wrote:
>>Last paragraph, page 55, Leitz document #920 083
>>"Leica lenses from 1965 onward absorb UV through the use of certain types
>>of glass and above all through a certain method of cementing the lenses. A
>>UV filter is unnecessary. Even at high altitudes, the UV filter has no
>What's the date on this? I seem to remember they used to say high altitudes
>could use a UV filter. That's quite interesting! 
>Eric Welch
>St. Joseph, MO
>I used to have a handle on life, then it broke