Gauging Depth of Field in Your Imaging System

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Gauging Depth of Field in Your Imaging System

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Over the years, we have answered countless questions regarding lens performance. Of those questions, none have been more difficult to define than requests for depth of field. The reason for this difficulty has more to do with the vagueness of the question than with the inability to provide a measured or calculated value. Consider for a moment what depth of field tells us. It is the distance by which an object may be shifted before an unacceptable blur is produced. For depth of field to be properly stated, it should contain not only the displacement of an image, but also a specific resolution.

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