the distance between the back surface of a lens and the focal plane when the lens is focused at infinity.
QUIZ YOURSELF ON THESE WORDS FROM BROWN GIRL DREAMING!
Visualize yourself passing this quiz on words from Jacqueline Woodson’s exquisite verse novel “Brown Girl Dreaming,” and then take the quiz to prove you can do it! (Because you can.)
Question 1 of 10
What does “barren” mean?
Origin of back focus
First recorded in 1895–1900
Words nearby back focus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020