Response to grey scale

A Grey scale, is a piece of card board that has printed on it a calibrated set of grey's each being a certain percentage darker than the previous one. This scale can be used to calibrate your photos in terms that are meaningful to scientists, and the technicians who make the prints for those not into developing and printing their own prints and negs. Kodak has several interesting booklets that describe grey scales but they are generally read by the scientifically minded. Try some of the works by Adams such as his "The Negative" or his "The Print".

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