[Leica] Bad luck with chrome 50/2 rigid Summicrons

[alal at duke.poly.edu (A. Lal)]

Concentric rings are a sign of decementing. The first series Summicrons, 
rigid and DR, are quite prone to this. There are repair shops that will 
clean and recement the elements
----- Original Message ----- 
From: "Vick Ko" <vick.ko@sympatico.ca>
To: "Leica Users Group" <lug@leica-users.org>
Sent: Tuesday, 07 October, 2008 8:56 AM
Subject: [Leica] Bad luck with chrome 50/2 rigid Summicrons


>I am running into a streak of bad luck with my 50/2 rigid Summicrons.
>
> First, I find my old DR Summicron has coating degradation - a light 
> fuzziness on the front coating I look closely at it.
>
> Then I check a 50/2 rigid chrome lens - it has the coating degradation but 
> to a lesser degree.  Then looking inside, it has concentric rings of some 
> haze.  It doesn't look like the rainbow rings of doublet separation.  They 
> look literally like large concentric rings of haze.  Have you heard of 
> this "rings" phenomena?
>
> Both might be destined to the "bay "as is" sales category.   :-(
>
> That or they are my "extra glow" 50/2's.
>
> Vick
>
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