Change the gamma of a developed silver halide image and you ~will~ get a change to the brightest and darkest values, as well as the slope. Using photographic papers as an example is not very illustrative because they are made to be developed to a narrow range of gammas. To change the slope by a significant degree you change the grade of paper. Any change to the paper development can only achieve small slope changes (by comparison to recommended development) before the results become unsatisfactory.
regards, Anthony Farr ----- Original Message ----- From: "Herb Chong" <[EMAIL PROTECTED]> > he said that both are contrast. that is what gamma adjustments in an image > editing program does, adjust the contrast while keeping the brightest and > darkest points the same. it changes the slope of the brightness versus input > value function, just like changing paper grade does. > > Herb... > ----- Original Message ----- > From: "graywolf" <[EMAIL PROTECTED]> > > > > Ah ha! So you are saying that monitor gamma is brightness, and film gamma > is > > contrast. I shall have to remember that difference. > > >
