Archived posting to the Leica Users Group, 1999/10/27

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Subject: [Leica] Oily marks on lens blades
From: Federico Agostini <FedericoAgostini1@compuserve.com>
Date: Wed, 27 Oct 1999 13:48:47 -0400
 
Hi, guys!
I own a Summicron ('60s vintage) and a Summarit 50mm for my M's. 
Recently, on the diaphragm's blades, I realized the presence of some kind 
of oily marks. Is that harmful to the optics or more importantly is it 
going somehow to be noticed on the images? It seems to me that the lenses 
performed great so far. Would it cleaning be a necessary option and would 
it be expensive? Thanks for comments and suggestions.

Federico Agostini
101715.212@compuserve.com