“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	Codex Committee on Cereals,Pulses and Legumes Codex Committee on Cocoa Productsand Chocolate Codex Committee on Contaminants in Food Codex Committee on Fats and Oils Codex Committee on Fish and Fishery Products Codex Committee on Food Additives Codex Committee on Food Hygiene Codex Committee on Food Import and Export Inspection and Certification Systems Codex Committee on Food Labelling Codex Committee on Fresh Fruits and Vegetables Codex Committee on General Principles Codex Committee on Meat Hygiene Codex Committee on Methods of Analysis and Sampling Codex Committee on Milk and Milk Product Codex Committee on Natural Mineral Waters Codex Committee on Nutrition and Foods for Special Dietary Uses Codex Committee on Pesticide Residues Codex Committee on Processed Fruits and Vegetables Codex Committee on Residues of Veterinary Drugs in Foods Codex Committee on Spices and Culinary Herbs Codex Committee on Sugars Codex Committee on Vegetable Protein, CCVP Codex Euricianus Codex Gregorianus Codex Juris Canonici

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