The Exposure Triangle, Part II: What Is “Exposure” and What Is A “Stop”?

“Exposure” and “Stop” Explained: In Part I of “The Exposure Triangle” (see that article here) we established the essential definitions of Aperture (f-number), Shutter Speed, and ISO. But, two vitally important questions must be answered if we want to gain complete control over our camera’s settings:  1) What is the “exposure“ of  a photograph, and…