单词	back focus
释义	back focus noun : the distance from the rear glass surface of a photographic lens to the focal plane when the lens is focused on a very distant object Word History First Known Use 1868, in the meaning defined above
随便看	procarpiums procarps procaryote procaryotes procatalectic procatalepsis procatarctic procathedral procathedrals Procavia procaviae procavias procaviid Procaviidae procaviidaes procedural procedural due process procedural face mask procedural face masks procedural mask procedural masks procedurally procedurals procedure procedure face mask

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