For what it's worth, I just dug a gray card out of the drawer and measured its reflection density. It was, coincidentally, log 0.81.
Mr. Poulsen insightfully provided the commonly used formula for...
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For what it's worth, I just dug a gray card out of the drawer and measured its reflection density. It was, coincidentally, log 0.81.
Mr. Poulsen insightfully provided the commonly used formula for...
The log 0.04 value above paper white was chosen because it is close to the limit at which we can see tonal difference on typical papers at the bright end of the scale. The brighter the tone, the more...
Mr. Grabiec, I could be mistaken but I believe that Mr. Kadillak is asking about reflection density of the paper rather than transmission denisty of film. Log 0.04 above white (b+f) is a reflection...
oops...
0.81 - 0.11(Dlow) = 0.70 (midpoint of Dfullrange)
There is a mathematical basis but you will have to define what the zones mean and have reflection density values for the black and white end tones in the scale. Then simple proportion determines the...