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back focus
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noun Photography.
the distance between the back surface of a lens and the focal plane when the lens is focused at infinity.
QUIZ
QUIZ YOURSELF ON "WAS" VS. "WERE"!
Were you ready for a quiz on this topic? Well, here it is! See how well you can differentiate between the uses of "was" vs. "were" in this quiz.
Question 1 of 7
“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.
Origin of back focus
First recorded in 1895–1900
Words nearby back focus
backfit, backflash, backflip, back float, backflow, back focus, back foot, back formation, back forty, back four, backgammon
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022