Lighting Ratios and Incident Metering.

alex,singer,photostudio,photographs,woman

"Light ratios are confusing because there is more than one way to describe the difference in intensity between lights and because incident readings used to infer reflected highlight-to-shadow ratios. So first let's start by defining terms:"

"INCIDENT RATIO : An incident ratio expresses the difference in intensity between two or more lights based on a meter reading taken at the point the light hits a reflective surface.


REFLECTED RATIO: A reflected ratio expresses the difference in intensity between the light reflecting from the highlights vs that reflecting from the shadows of the same three dimensional object of similar tone like a white ball or the front of the face. The reflected ratio is also referred to the highlight:shadow or H:S ratio. A 2:1 H:S ratio indicates that the highlights appear twice as bright as the shadows."

Lighting Ratios at Super.Nova.org


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