英语词汇“focal aperture”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 aperture
释义	Definition of focal aperture in English: focal aperture noun Optics Photography 1The aperture at the focal plane of a telescope or other optical instrument (now rare). 2A measure of the light-collecting power of a lens, telescope, etc. Origin Mid 19th century; earliest use found in The Civil Engineer and Architect's Journal. Definition of focal aperture in US English: focal aperture noun Optics Photography 1The aperture at the focal plane of a telescope or other optical instrument (now rare). 2A measure of the light-collecting power of a lens, telescope, etc. Origin Mid 19th century; earliest use found in The Civil Engineer and Architect's Journal.
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更新时间：2025/2/26 18:03:43