Archived posting to the Leica Users Group, 1997/07/29

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Subject: Re: Collapsible Summicron 50 (M3 D/S)
From: Leikon35@aol.com
Date: Tue, 29 Jul 1997 15:02:52 -0400 (EDT)
 
The softness was in the coating , not the glass.  Soft coating usually had a
yellowish
tint where-as the harder magnesium flouride was more magenta.
Re-polishing & re-coating early Summicron lenses comprise a large part of
John Van
Stelton's work.  He does an excellent job for about $100.