Patent ID: 6845218

Claim:
An interchangeable lens type camera system comprising: a camera body; and an interchangeable lens removably attached to the camera body; wherein the camera body comprises: a first CPU for controlling a shooting operation by the camera, an interlocking pin mounted at a camera side mount and adapted to move in interlocking with an operation for attaching the interchangeable lens, and a detection switch connected to the first CPU, wherein the detection switch is switched from a first state to a second state due to movement of the interlocking pin in response to a start of attachment of the interchangeable lens, and is switched back from the second state to the first state in response to completion of the attachment of the interchangeable lens; wherein the interchangeable lens comprises a second CPU for controlling lens operations, and wherein the first CPU supplies reset signals to the second CPU in response to the switching of the detection switch from the first state to the second state when the interchangeable lens is attached to the camera body, and cancels the reset signals in response to the switching of the detection switch from the second state to the first state.