The Canon 1Ds III provides a 21-Megapixel, full-frame image. Other key features include a 3-inch LCD with Live View, dual Digic 3 image processors, automated self-cleaning system, and a 45 point autofocus system with 19 high precision cross-type sensors.
For many years, this was THE camera for high resolution images. It’s a bit long in the tooth now, but still useful in certain situations — when you need robust weather sealing, long battery life, top-level autofocus, etc. On the other hand, the rear LCD really shows the cameras age and you won’t want to try live-view focusing with it.