Archived posting to the Leica Users Group, 1997/03/12

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Subject: Re: Leica-Users List Digest V1 #401
From: Craig and Barbara Shier <shier@mnsinc.com>
Date: Wed, 12 Mar 1997 21:06:22 -0500

>From: "Nicolas Levinton" <nicolev@jet.es>
>Date: Tue, 11 Mar 1997 02:40:55 +0100
>Subject: vignetting when using two filters on Summicron 35? 
>
>Hi.
>
>Could it be possible that I=B4m getting almost unnoticeable vignetting, =
>but noticeable anyway, when I used a B+W blue filter on top of another =
>UV filter of the same brand on my Summicron 35mm? What will happen when =
>I buy the lens shade and put it on top of the UV(which I=B4d like to =
>leave always inserted, mainly for protection from scratches)?
>
>Thanks a lot.
>
>	Nicolas Levinton. Madrid. SPAIN
>	nicolev@jet.es

This doesn't surprise me.  I only have one B+W filter but it is about 50%
thicker than other filters I own.  I would say stacking two B+W filters
would be as likely to vignette as stacking three other brand filters (Tiffen
for example).
Craig and Barbara Shier
Manassas, VA
shier@mnsinc.com