Understanding Photographic Exposure
How Exposure Works
The purpose of this book is not to teach you to be a photo lab technician but to give you the basic knowledge and tools to become a better photographer. While I won’t go into great detail about photo processing, it is important to understand the fundamentals of it—which, in turn, will make you a better photographer. So in a nutshell, here’s how exposure works.
In black-and-white photography, the film is coated with a layer of gelatin that contains silver halide particles, which are sensitive to light. We call this the “emulsion” of the film.
As light hits the film, the silver halide particles are excited in direct proportion to the amount of light that hits them.
When the film ...