Archived posting to the Leica Users Group, 2000/11/16

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Subject: Re: [Leica] UV filter for Noctilux-measurable light loss??
From: John Collier <jbcollier@home.com>
Date: Thu, 16 Nov 2000 15:09:53 -0700
 
If the Noctilux is wide open and you put a UV filter with a mount of normal
thickness on the lens, the exposure may be reduced significantly by the
increase in the amount of vignetting (caused by the rim of the filter) not
the extra glass of the filter.

John Collier

> From: Rob McElroy <idag@pce.net>
> 
> Anyone else have any thoughts on whether a UV filter cuts out a measurable
> amount of light?