英语词汇“guide number”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	guide number
释义	guide number noun Photography A measure of the power of a flashgun expressed in metres or feet.Such technical items as ‘guide numbers’ don't seem to matter any more.... Unless you're shooting under those conditions, consider the guide numbers to be estimates. Small flashes have guide numbers ranging from 45-80, while large shoe-mount units will be up to around 130.
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