I teach basic and color photography. One of my students let me borrow her copy of the original(1989). One problem in explaining aperture, shutter speed, and depth-of-field is that photos would really help. This book does that, as well as having photos that address loading the film, types of lenses, light, and use of flash. Yes, there are people out there that don't know how to load film. Although modern cameras may have electronic gizmos to deal with aperture and shutter speed, this book helps the understanding of how everything works, as all cameras do the same thing.