“F数漂移式变焦距镜头”的概念、定义、翻译、参考文献-科学参考

单词	F数漂移式变焦距镜头
释义	F数漂移式变焦距镜头 Encyclopedia 艺术学镜头参数释 F-number drift zoom lensF数漂移式变焦距镜头当摄影镜头焦距f＇改变时，该摄影镜头的入瞳直径Dλ虽也跟着产生改变，但变化的倍率小于焦距f＇的改变，即f＇与Dλ二者的比值在变焦中改变了，从而使该摄影镜头的F数在变焦的全过程中产生变化的变焦距摄影镜头。
随便看	ruled ruled grating ruled quadric ruled surface ruled surface directrix ruled-surface map ruled surface of rotation rule for infrastructure and resources planning to soliciting opinions of soil and water conservation rule learning rule of 72 rule of administrative law rule of assignment Rule of Ci Poetry rule of commutativity rule of commutativity of equivalence rule of compound transposition rule of conflict rule of corroborative evidence rule of derivation rule of detachment rule of disjunction rule of electroneutrality rule of elimination rule of equal amount of substance rule of equality

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