This book presents the zone system as developed by Ansel Adams more than forty years ago and it is a means of exposure mainly developed for precise exposure of black and white film and changing contrast through film development. I will also go into digital techniques. We all are familiar with the beautiful mountain scenes created by Ansel Adam's and they were made using the zone system.This is a short text but it can get you started in the right direction and it will get you ready for further study. If you wish.