| 释义 |
Definition of back focus in English: back focusnoun Photography The distance between the back of a lens and the image of an object at infinity. Example sentencesExamples - If the focal length is positive and the back focus B is longer than the focal length, the result is a reversed telephoto, or retrofocus.
Definition of back focus in US English: back focusnoun Photography The distance between the back of a lens and the image of an object at infinity. Example sentencesExamples - If the focal length is positive and the back focus B is longer than the focal length, the result is a reversed telephoto, or retrofocus.
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