Depth of focus
Lens optics concept / From Wikipedia, the free encyclopedia
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For the seismology term, see Depth of focus (tectonics).
Depth of focus is a lens optics concept that measures the tolerance of placement of the image plane (the film plane in a camera) in relation to the lens. In a camera, depth of focus indicates the tolerance of the film's displacement within the camera and is therefore sometimes referred to as "lens-to-film tolerance".