f-stop

f-stop
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.

If youre 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.


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