Digital Manipulation:What is "Pure Photography?"
Digital Manipulation:Responsibilities of Photojournalism
A very good read. For those who want their photos to represent the "reality" or the "truth" :
". . . to get a photo to render real life, one must do a certain amount of manipulation. The reason is a simple matter of science: the technical limitations in film, digital sensors, scanners, photo paper, and even computer monitors, mean that reproduced images cannot match the range or quality of light that nature produces in real life. Therefore, it becomes the burdensome task of the photographer to work within technical limitations to render something that APPROXIMATES light."