“F-number drift zoom lens”的概念、定义、翻译、参考文献-科学参考

单词	F-number drift zoom lens
释义	F-number drift zoom lens 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	Seeking the Tao in the Autumn Mountains seek time Seek Truth Seeley Seeliger paradox SEEM seeming error See off Yu Xueguan Back to Luojiang seepage seepage analysis of hydraulic structure seepage analysis of tailings dam seepage boundary condition seepage control of canal seepage control standard for hydraulic structures seepage curve seepage deformation of soil seepage discharge of oil absorption seepage failure seepage field seepage flow and flow net seepage force seepage loss seepage mathmatical model seepage-reflux mechanism seepage stability of foundation

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