Patent ID: 7260322

Claim:
A camera system including a camera body and an interchangeable lens attachable/detachable with respect to the camera body, comprising: an intermediate adapter detachably attachable between the interchangeable lens and the camera body and capable of changing a focal length of the interchangeable lens; focus detection means, disposed in the camera body, for detecting a defocus amount of the interchangeable lens; and storage means, disposed in the interchangeable lens, for storing AF correction data which corrects the defocus amount of the interchangeable lens detected by the focus detection means, wherein the AF correction data stored in the storage means includes: first AF correction data determined by an optical characteristic of the interchangeable lens and constituted in accordance with a type of a light source to illuminate a subject; and second AF correction data determined by an optical characteristic of the interchangeable lens combined with the intermediate adapter and constituted in accordance with the type of the light source to illuminate the subject.