retrofocus lens

American  

[re-truh-foh-kuhs] / ˈrɛ trəˌfoʊ kəs /

noun

1. a wide-angle lens, for use on single-lens reflex cameras, of inverted telephoto design, with a back focus greater than the focal length.

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Etymology

Origin of retrofocus lens

First recorded in 1960–65; retro- + focus

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