Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A camera lens aperture setting that corresponds to an f-number.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun photography  Any of the discrete steps or stopping points foradjusting theaperture of alens , either marked on aring on the lens and adjusted byrotating that ring or marked in the display of adigital camera and adjusted bybuttons or touch-sensitive controls.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
Support
 
				Help support Wordnik (and make this page ad-free) by adopting the word f-stop.
Examples
- 
								Notice the decrease in sharpness as I increased the f-stop (decreased the aperture diameter). Archive 2009-06-01 AYDIN 2009 
- 
								Few of God's wonders are as inspiring as a waterfall: Ah ... wide-angle lens, 1/8-second exposure (without a tripod), f-stop, let's see ... Style Invitational Week 872: Make a word out of a name; and geeky musings 2010 
- 
								Contact f-stop focus: top 10 Rock-tographers on Flickr f-stop focus: top 10 Rock-tographers on Flickr « the pureamber blog | explore see grow 2010 
- 
								Moath 18 days ago brilliant, @ what f-stop were you filming this? 
- 
								Buy a camera that goes down to an f-stop of at least 2.8. 
- 
								This would indicate (1) low f-stop (2) high pixel count and top quality lens (3)pushing the saturation during processing. 1 and 2 are camera functions, both of which my Canon S2 fall short on. 
- 
								Surefire flashlights are the best of the best and amazing for light painting--just watch that f-stop and shutter speed w/ 120 lumens! RadioPopper JrX Will Make You Fat and Happy [Full Review] 2009 
- 
								Notice the decrease in sharpness as I increased the f-stop decreased the aperture diameter. Depth of field, f-numbers and diffraction (or how to take a rotten photograph) AYDIN 2009 
- 
								I need to work on depth of field; in olden times that meant shrinking the aperture/cranking up the f-stop with an attendant longer exposure time if I remember correctly. Nerdism 2009 
- 
								I need to work on depth of field; in olden times that meant shrinking the aperture/cranking up the f-stop with an attendant longer exposure time if I remember correctly. 
oroboros commented on the word f-stop
The "F" refers to focal length.
March 26, 2011