Archived posting to the Leica Users Group, 2003/05/17

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Subject: Re: [Leica] Vignetting of Summicron M 2/28mm ASPH
From: Dennis Painter <dennis@hale-pohaku.com>
Date: Sat, 17 May 2003 07:40:11 -0700
References: <03E63C98-8802-11D7-A816-0050E42E6E0B@shaw.ca> <001101c31c26$03b78680$0100a8c0@liyue> <00ad01c31c38$3968ed70$70a72350@home> <003101c31c6e$37cd7d60$6401a8c0@oemcomputer>

I think the more likely cause is that his lens either has an element edge that
is not fully blackened or a bright spot of metal in the mount that is creating
internal reflections.

In any event it should be checked by a competent repair person.


Don Dory wrote:

> Rafael,
> I wouldn't condemn all 28 Summicrons based on the sample  provided.  I
> suspect this one is flawed and needs to be returned.  For example, last week
> one of the group complained that his/her 24 ASPH flared like crazy: yet I
> can not make mine flare, even when shooting diagonally into the sun.
>
> My personal belief is that the Leitz designs are very build sensitive.  So
> if an element is a little out of place then really bad things happen.  That
> might be why all aspheric lenses go back to Solms for repair.
>
> I can say that many on this list treasure the performance of their 28.
>
> Don
> dorysrus@mindspirng.com
>
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In reply to: Message from John Collier <jbcollier@shaw.ca> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
Message from "Y. Li" <liyue@netvigator.com> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
Message from "Rafael Alday" <rafaelalday@yahoo.es> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
Message from "Don Dory" <dorysrus@mindspring.com> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)