F-stop

Alternative forms

• f stop, f/stop

Full definition of f-stop

Noun

1. (photography) Any of the discrete steps or stopping points for adjusting the aperture of a lens, either marked on a ring on the lens and adjusted by rotating that ring or marked in the display of a digital camera and adjusted by buttons or touch-sensitive controls.
• 2008, Ted Kritsonis, "Six of one, half a dozen of the other," Globe and Mail (Canada), 23 May (retrieved 26 Dec. 2008):If you're shooting at an f-stop of 2.8, then the lens will take in a lot more light than it would if the f-stop was at 22.