I made a reference in a group of someone not ever having to know the difference between f-stop & aperture and someone else called me out on the difference. Where most people think they are the same, I posted this as an example to the difference.
The f-stop is responsible for DOF (Depth of Field). The lower the f-stop, the lower the number of items that are in focus relative to subject. The higher the f-stop, the higher number of things that are in focus relative to subject. Aperture is the opening that adjusts to the f-stop value. High f-stop, low aperture opening and vice-versa.
For example, on a bright, sunny day with some daisies:
f/32 – narrow aperture and slow shutter speed – a lot of the picture is in focus relative to subject
f/5.6 – wide aperture and fast shutter speed – very little (if any) of the picture is in focus relative to subject
I know it really does seem like semantics, but I believe the difference does work hand in hand with each other in the grand scheme.