The Nikonos Handbook is 167 pages of a in-depth breakdown on the use of the Nikonos model V and model IV-A 35mm underwater cameras. This book covers all the details one would need to understand when you go into serious diving that may take you down to depths of at least 100 feet or more underwater ( the Nikonos V is rated to go to a maximum depth of appx 165 feet). Great details on maintaining your camera as well as a large section on using Nikonos strobes underwater as well. A massive amount of beautiful photos to show examples of how to get the most from your underwater photography with a legendary Nikon camera. This is the 1st edition and was published in 1986.