英语词汇“focal ratio”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

focal ratio

释义

Noun: focal ratio 'fowkul 'reyshow

The ratio of the focal length to the diameter of a (camera) lens system
- f number, stop number, speed

Derived forms: focal ratios

Type of: ratio

Encyclopedia: Focal ratio

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