“standard lens”的概念、定义、翻译、参考文献-科学参考

单词	standard lens
释义	standard lens [`stan·dǝrd `lenz] ^OPTICS Usually the lens provided with a camera as standard equipment; in still cameras, the standard lens is one whose focal length is about equal to the length of the diagonal of the negative area normally provided by the camera; the normal field of view of a standard lens is about 53°.
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