“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	emission spectrum emission standard for industrial enterprises noise at boundary emission standard for ocmmunity noise emission standard of air pollutants for fossil-fired power plant emission standard of environment noise for boundary of construction site emission standards and measurement methods of railway noise on the boundary alongside railway line emission standards for stationary sources emission trading scheme emission trading system emission value emission variable emissive emissive heat emissive power emissivity emissivity calibration emissivity measurement Emissivity Measurement by Measuring Eimissions emit emitron emittance emitted emitted color calibration emitted color standard emitter

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