Re: Is it Gray or Grey?
Most cameras' reflective metering will give an accurate reading of exposure on an 18% gray surface. That's exposure ... not color balance. However, many people do use 18% gray cards as a way to set white balance -- often with disappointing results since the cards were a way to precisely meter density, not color.
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PhotosbyChuck
“There are no rules for good photographs, there are only good photographs." - Ansel Adams
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