1. A simulator for automatic color photographic printers which are adapted to print an image recorded on a film on a printing paper sheet to obtain a final print, said image being picked up by an image sensor and displayed on a CRT as an image that is identical with the final print, comprising: a gamma correction means adapted to receive the output signals from said image sensor and to conduct gamma correction such that the total gamma of said CRT and the output signals from said gamma correction means is made equal substantially to the gamma of the printing paper, without logarithmically transducing said output signals of said image sensor; and a transduction means adapted to receive the output signals from said gamma correction means and to transduce them into the luminance signals for said CRT which are output to said CRT.