back focus

Save This Word!

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

Think back to the Bush-Kerry race of 2004, the Thrilla in Vanilla.
Jeb Bush’s Unseen Anti-Gay Marriage Emails|Jackie Kucinich|January 9, 2015|DAILY BEAST
Back in New York, the slow pace and inward focus of her yoga practice was less fulfilling.
How Taryn Toomey’s ‘The Class’ Became New York’s Latest Fitness Craze|Lizzie Crocker|January 9, 2015|DAILY BEAST
Music is a huge part of the tone of Black Dynamite overall—going back to the original 2009 movie on which the series is based.
‘Black Dynamite’ Presents Police Brutality: The Musical|Stereo Williams|January 9, 2015|DAILY BEAST
The al Qaeda-linked gunmen shot back, but only managed to injure one officer before they were taken out.
France Kills Charlie Hebdo Murderers|Nico Hines|January 9, 2015|DAILY BEAST

So, Islamized teaching sends girls back home for marriage and housework, and remains exclusively for boys.
Houellebecq’s Incendiary Novel Imagines France With a Muslim President|Pierre Assouline|January 9, 2015|DAILY BEAST
I waited three months more, in great impatience, then sent him back to the same post, to see if there might be a reply.
The Boarded-Up House|Augusta Huiell Seaman
Ages back—let musty geologists tell us how long ago—'twas a lake, larger than the Lake of Geneva.
Blackwood's Edinburgh Magazine, Volume 60, No. 372, October 1846|Various
The boys were tumbling about, clinging to his legs, imploring that numerous things be brought back to them.
The Awakening and Selected Short Stories|Kate Chopin
With a suffocating gasp, she fell back into the chair on which she sat, and covered her face with her hands.
The Pastor's Fire-side Vol. 3 of 4|Jane Porter
She was holding the back of her chair with one hand; her loose sleeve had slipped almost to the shoulder of her uplifted arm.
The Awakening and Selected Short Stories|Kate Chopin