Response to How do I use a densitometer to get my EI and dev time?

gamma as discussed in photography is a measure of the rate of change of the film's density with respect to exposure, if you look at a film's density curves (you can find some for tmax on kodak's web site) gamma is the slope of the line (it's a 1st derivative if you know a little about calculus) on the graphs.... note also this shape depends on development

good luck

joe

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