Here we go again. Another explanation of a million out there of F stop numbers in photography. Yep ok..those of you out there who get it...congrats, cause when you do understand it,its a pretty cool thing to understand when you understand the whole triangle with ISO and shutter speed.
So yes, there is a physical/mechanical aspect to this whole thing but my explanation of F Stop numbers is an explanation of what the setting can do to your photo to create a particular type of shot that's call DEPTH OF FIELD