Optical Quality

It is not possible to consider the quality of a digital camera’s sensor in isolation because the lens in particular also has a huge effect on the overall image. This is quite different from the situation that exists in film photography, where the film and lens can be evaluated independently. Conventional testing is not entirely appropriate in the digital arena and a great deal of new work has been done by Anders Uschold, leading to the formulation of his DCTau method of camera-and-lens testing. More details about this are available online at

Two of the most basic digital difficulties arise from the fact that electronic imaging sensors have various sizes (see Chapter 14) but always a regular array of ...

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