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incident vs reflective metering

This is a discussion on incident vs reflective metering within the Lighting Discussion forums, part of the Photography Information category; Looking get a light meter, mainly for flash metering. However, one quick question, non flash-metering related: for reflective (in camera) ...

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incident vs reflective metering - 03-07-2011, 07:16 PM


Looking get a light meter, mainly for flash metering.
However, one quick question, non flash-metering related: for reflective (in camera) metering, you have to compensate -1, +1, etc in the meter for red vs gray vs green vs highly reflective, etc . Do I understand right that that is not neccessary with incident? you just walk up, meter, and that's what you set in M mode? no fudge factor except if you camera needs compensation? Hard to believe. I can belive it for basic red vs green, but even for chrome and highly reflective surfaces as well?
Personally, if that's true that's such a time saver in certain situations.

Last edited by raulbena; 03-07-2011 at 07:17 PM.. Reason: typos
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03-07-2011, 10:34 PM


An incident meter reports the light falling on the subject, hence no need to compensate for reflectance departures from mid gray. If f/5.6 is falling on the subject, then you set your aperture to f/5.6 - if the subject is highly reflective it will appear as highly reflective but properly exposed - similarly, if the subject has low reflectance, it will be correctly exposed and it will look like a low reflectance subject. It's that simple.

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