equivalent focal length

noun
variants: or equivalent focus

Definition of equivalent focal length

: the focal length of a single thin lens that would best duplicate the images formed by a given thick lens, compound lens, or lens system

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Cite this Entry

“Equivalent focal length.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/equivalent%20focal%20length. Accessed 17 Sep. 2021.

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