Archived posting to the Leica Users Group, 1997/06/11

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Subject: Re: Noncoated filter
From: "Jacques Bilinski" <jbilin@axionet.com>
Date: Wed, 11 Jun 1997 22:42:31 -0700
 
> >uncoated. Is it less important for a filter to
> >be coated than for a lens? 
> 
> Take it back. It will be the first surface to greet the incoming light
> rays. If it's uncoated, a lot of scattering, reflecting, and other ugly
> phenomenon will take place. 
> 
It seems to me that any light reflected from the first surface of the
filter will simply be reflected back to the subject and therefore not
degrade the picture. I can understand why the surface of the filter closest
to the lens benefits from coating. Am I missing something?