This book will give you a rounded and complete idea of how to control exposure. The book isn't DSLR or analog specific and covers aspects of both. It explains the three components to exposure, which are ISO, aperture, and shutter speed. Concepts such as depth of field and a quick overview of Ansel Adams' zone system are also covered. The focus is mainly on how to get a great exposure from the start, but there are also tips on how to fix an overexposed or underexposed photo.