1. A computer controlled still camera, comprising: a computer for controlling shutter speed and aperture during the capture of optical images on film using the camera in response to camera control settings; one or more image targets for converting an optical image into an electronic still image; and a viewfinder display for displaying an image from an image target, wherein, the image can be modified while being displayed to reflect changes to the image occurring as a result of image processing in the computer, said image processing occurring to simulate adjustment to settings of the camera, according to characteristics of at least one of a shutter setting, an aperture setting, and a film.