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Lighting & Contrast Ratios

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Old 06-07-2004, 11:54 PM
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Duv Duv is offline
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Location: Nanaimo, British Columbia
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Lighting & Contrast Ratios

Let's assume I have a picture taken in a studio using Butterfly lighting (basically lighting that is straight on and produces no descernible difference on the right and left side of the face). I now want to add shadow detail to the left side to produce a 2:1 lighting ratio (that is, the shadow is 1/2 the brightness of the highlight)

How is this accomplished in PS? By the numbers please.

Cheers
Dave
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