It's nearly professional in quality, with the most advanced features--and if you want to use one to its utmost, you'll have to go beyond what the regular instruction manual tells you! This top-of-the-line guide lays out everything there is to know about the new 45-point autofocus, the 21-zone evaluative metering, the eye-controlled focus, and 18 custom functions for expanded camera flexibility. And, of course all accessories are covered, including the sophisticated E-TTL flash exposure system.