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Critical focus

The area of critical focus is the portion of the picture that is optically in focus.

In a photograph, the area of critical focus is the portion of the picture that is optically in focus. This does not relate to depth of field which describes apparent sharpness. Reducing the size of the aperture will increase the depth of field but the plane of critical focus will not change. Depth of field extends away from the plane of critical sharpness.

Key Terms

apparent sharpness
area critical focus
definition
depth field
field
focus
photograph
picture
portion
usage

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Critical focus
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Last modified on June 23 2020
Content adapted from Wikipedia
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