英语词汇“iso rating”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	iso rating
释义	Collins Concise English Dictionary © HarperCollins Publishers:: ISO rating n a classification of film speed in which a doubling of the ISO number represents a doubling in sensitivity; for example, ISO 400 film requires half the exposure of ISO 200 under the same conditions. The system uses identical numbers to the obsolete ASA rating Etymology: 20th Century: from International Standards Organization
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