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01-19-2011, 11:51 AM   #16
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QuoteOriginally posted by newarts Quote
Perhaps the magic 18% is related to the fact that an average caucasian face has a reflectivity of about 18%. If I were marketing cameras to a caucasian crowd I'd want to make sure photos of faces came out ok.
Thought it was based on the average landscape.

01-19-2011, 12:27 PM   #17
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QuoteOriginally posted by cats_five Quote
Thought it was based on the average landscape.
I think you are right. I remember the skin reflectivity from many years ago as a student in a darkroom. So I googled it.

Based on Google results, Ansel Adams called 18% mid gray and it is how we percieve 50% brightness. A caucasian face is 2/3-1 stop brighter.


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