Automatic flash technology has revolutionized photography. Originally seen as just a way of illuminating dark scenes with portable light, flash is used today for a host of creative functions, including supplementing daylight and designing complex scenes lit by multiple light sources. But flash photography is also a difficult artistic and technical challenge. It's easy to get that harsh deer-in-the-headlights look from built-in automatic flash, but using electronic flash to create striking or natural-looking images is not as straightforward. "Mastering Canon EOS Flash Photography" will be the authoritative book on the subject, guiding the reader through everything from Canon's Speedlite flash system to off-camera portable flash and professional studio lighting. It begins with the fundamentals of flash metering technology, discusses key concepts, and documents the various features and functions available with EOS gear. It will be illustrated throughout with clear diagrams describing important functions and lighting arrangements, and with quality photographs demonstrating sophisticated flash techniques. Unlike other works on the topic, it will also cover the burgeoning field of non-dedicated off-camera flash. This is an area traditionally seen as too daunting for all but professional photographers. But the combination of digital's immediacy and ease of use, and popular Web sites such as Strobist.com have brought off-camera flash to a whole new audience.