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单词 retrofocus
释义

retrofocus

Photography
adjective
Designating a lens in which the distance from the back of the rear lens to the image plane (the back focus) is greater than the focal length of the lens, so allowing space for a reflex mirror or prism.
  • Retrofocus lenses are typically designed as inverted telephoto lenses, with the negative element placed before the positive one instead of after it..

Origin

1950s; earliest use found in Journal Criminal Law.

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更新时间:2024/11/11 0:25:03