英语词汇“petzval lens”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	petzval lens
释义	Petzval lens Petzval lens [′pets·väl ‚lenz] (optics) A photographic objective which consists of four lenses ordered in two pairs widely separated from each other, with the first pair cemented together and the second usually having a small air space.
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Petzval lens