I SEE F-STOPS ON MY 3D CAMERA, WHAT ARE THEY AND HOW DO I USE THEM?

Mike Griggs replies

When there is an F-stop option on a 3D camera object, most often through the attribute or properties palette of an application, this is a setting which mimics those of real-world cameras. An F-stop (also known as an F-number) is the width of the hole (or aperture) that the aperture blades create in the camera lens. The bigger the hole, the ‘larger’ the F-stop number. The easiest way