This aperture diagram shows the relationship between the f-stops, designated by numbers 2, 2.8, 4, etc., and the size of the corresponding aperture. In any sequence of f-stops, you are either doubling ...

Photo: Charlie Sorrel/Cult of Mac A few days ago, we learned about the iPhone’s shutter, the part of the camera that “opens and closes” to let light onto the sensor. Today, we’re taking an in-depth ...

A much more important value is the size of the camera's aperture, commonly listed as an f-number. The f-number is a ratio between the focal length and size of the hole, and tells you how much light ...