Ansel Adams and Fred Archer developed the Zone System in the late 1940s as a way to standardize the way film was exposed to light. The system is based on the idea that each zone represents a different level of brightness, with Zone 0 being the darkest and Zone VIII being the lightest. By correctly exposing the film to the correct amount of light, photographers can ensure that the final image will have the desired level of contrast.
The Zone System is still used by photographers today, even though the technology has changed. With the advent of digital photography, the Zone System can be used to help photographers get the perfect exposure for their images. By understanding the different zones and how they relate to each other, photographers can take control of the exposure process and create stunning images.