Re: [Leica] M6 metering question

[Bill Satterfield <cwsat@cyberhighway.net>]

Youj can under or overexpose by changing your ISO!!!!!!!!!!!!

Simon Lamb wrote:

> Hi
>
> I have been using my M6 for a few days now and I have a question.  I
> pointed the camera at a whitewashed textured wall, with ISO 400 Tri-X
> loaded, a 50mm f/2 attached and with the film speed dial set to 400, and
> the red dot appeared when the camera was set to a shutter speed of
> 1000/sec at f/13 or f/14 (whatever the half stop between f/11 and f/16
> is on the lens).  I pointed my Nikon F5 at the same spot on the same
> wall using an ISO 400 speed and an 85mm f/1.8 lens and, using spot
> metering (therefore switching off any colour metering capability), it
> registered settings of 400/sec at f/10.
>
> There is a significant difference here and I wondered if anyone could
> explain to me the reasons for the difference in metering and subsequent
> camera set-up.  I have always trsuted the F5 meter and it has never been
> anything other than spot on.  I am sure the M6 meter is equally
> accurate.  However, given that I would probably want to dial in some
> overexposure on the white wall to get the whiteness and texture on the
> film, I do not have any f/stops or shutter speed left to enable me to
> overexpose by 1 or 1.5 stops.
>
> Any explanations would be gratefully received.
>
> Regards.
>
> Simon