A digital AF single-lens reflex camera oriented towards professionals. To realize a camera that can serve as an optimal tool to professional users, further sophistication was added to the operation system, display system and structure of the EOS-1D Mark III. The operation and display systems use a new graphic user interface to fully realize irrefragability and intuitive understandability, whereas the shape of the camera thoroughly pursues a sense of solidness and reliability by giving priority to easily usable operations and display system.