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2 Camera equipment > The role of the camera in the imaging process

The role of the camera in the imaging process

While the basic features of cameras described above are the same regardless of the type of sensor used (film or digital), at a quite fundamental level the function of the camera is different.

Film cameras

A photographic (silver halide) emulsion produces a latent image when exposed to light, i.e. an image that is not yet visible but has the potential to be developed and rendered permanent. In this case, the sensitive material (the emulsion) fulfils both capture and storage functions in the imaging process. To create a viewable image, the exposed film must be removed from the camera and go through a series of chemical processes to amplify and fix the image. The film is exposed frame by frame at the focal plane, and necessitates a means of either removing a single sheet of film from the camera, or winding the film on if using roll film.


  

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