Archived posting to the Leica Users Group, 1999/04/29

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Subject: [Leica] Re: Filters, M6 and exposure correction
From: George Huczek <ghuczek@sk.sympatico.ca>
Date: Thu, 29 Apr 1999 20:24:26 -0600
 
At 07:51 PM 29/04/99 -0500, you wrote:
>Will the M6, with thru the lens metering, calculate a correct exposure for
>any color filter that is on the lens?   So there will be no need to dial in
>a filter correction.
>
Meters don't have uniform spectral sensitivity throughout the visible
spectrum.  Some compensation may be needed with certain filters to
compensate for loss of meter sensitivity with certain wavelengths.  The
type of light source used also affects meter sensitivity (i.e. tungsten
lighting vs mid-day daylight, etc.)