Back focus

The distance between the rear glass surface of a lens and the focal plane, measured when the lens focuses on a very distant object.

Back focus is the distance between the rear glass surface of a lens and the focal plane, measured when the lens focuses on a very distant object.

Alternatively, back focus is used to refer to the error of having a subject in the shot accidentally out of focus, thus the sharp focus falling behind, or past, the subject. 

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Back focus
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Adapted from content published on slrlounge.com
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  • Image by Lanty: some rights reserved — from flic.kr
Last modified on August 9, 2020, 2:18 am
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