how to read apertures on your camera; what does f/4.0 mean; what is the difference between f/1.8 and f/4.0; what is the difference between f-number & lens opening)

What is Aperture? An Overview of Common Aperture Settings and Their Uses The aperture, as a camera setting, refers to the size of the opening in front of the film or sensor. The camera aperture and depth of field can be wide opened or closed down. There are many different types of apertures that you…