Handy-Dandy List of f-Stops (in a table)

Every wonder what “half a stop” means in relation to the maximum aperture of a lens? Me, too! So here’s a handy-dandy list of f-stops in a simple table for your reference. 

Without further ado, here is the list of f-stops, from f/1 up to f/22, include fractional f-stops. There are f-numbers higher than f/22, but these mostly don’t apply to general photography.

As you peruse this list of f-stops, consider following this Amazon Affiliate link as a way to support this site. It costs you nothing and it will help me keep articles and reviews coming.


You can calculate the actual diameter of the aperture in any given scenario by dividing the focal length of a lens by the f-stop number. For example, a lens with a 85mm focal length stopped down to f/10 has an aperture diameter of 8.5mm. So then, if you double the f-stop, it cuts in half the aperture diameter, which in turn halves the amount of light entering the camera.