Archived posting to the Leica Users Group, 2001/11/24

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Subject: Re: [Leica] How soft?
From: SthRosner@aol.com
Date: Sat, 24 Nov 2001 11:11:26 EST

In a message dated 11/24/01 10:37:59 AM Eastern Standard Time, 
durling@widomaker.com writes:

> I have to say that a fingerprint on the lens is definately a concern with
>  the Summicron of the DR vintage. 

.............as far as I am aware, a fingerprint on any lens surface of any 
vintage is a concern if not removed fairly promptly. The fingerprint mark 
represents oils or acids that will etch the lens surface. A hard or soft 
coating will make no difference once the etching process has taken place 
though some coatings may be better inhibitors of the etching process than 
others. 

Keep them fingers to themselves. If you have wandering fingers that won't 
behave and you cherish your lenses (whether Leica, Nikon, Zeiss, Canon, 
Minolta (thank you, Felix)), run the risk of slight image degradation and 
protect them with - heaven forbid - a UV filter.

seth         LaK 9   
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