Thomas Clausen wrote:
>I have noticed that when using the pol-filter, the TTL meter in the OM's
>indicate 1-2 stops lower than without the filter. This makes sense, since
>the pol-filter is intended to reduce the amount of light according to the
>lights polarization. However applying that information directly to the
>meter readings done with the hand-held meter somehow doesn't seem right to
>me. I'd imagine e.g. that the ratio of the reflected light going through
>to the film depends quite a lot on the polarization of said light & the
>position of the filter, and that no general rule can be applied regarding
>the reading on a hand-held meter when using filters.....
Yes, the slow rotation of a polarising filter will cause fluctuations to a
camera's meter needle (or whatever) as the sky, for example, lightens and
darkens, but if your subject is a face, say, the reflected light is not to
going to change, and the filter factor should be constant. So you can safely
apply that factor to your handheld meter reading - unless, of course, your
main subject is the polarised sky or sea. Well, there has to be an exception
to every rule.
Regards,
Keith Berry
(Birmingham, England)
k.berry@xxxxxxxxxxxxx
www.keithberry.telinco.co.uk
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