This chapter discusses how our light-sensitive camera materials work, especially colour films. It traces the way that ingenious principles have been put into practice and compares how films record relative to the way our eyes see subjects directly. So the chapter begins by describing how eyes and brain receive and interpret the sensation of colours and comparing this with the far more fixed chemical response of colour films. Differences between seeing and photographing are important to grasp in order to control results. … PDF: How Camera Materials Work