There is provided an interchangeable lens, a camera body, a camera system, and a method for controlling the same, with which a highly efficient and stable image blur correction effect can be obtained. A camera system 1 has a camera body 10 and an interchangeable lens 20 that can be attached to and detached from the camera body 10. The camera body 10 has an imaging unit for imaging a subject through the interchangeable lens 20, and a sequence microcomputer 100 capable of sending and receiving information to and from a lens microcomputer 200 and for controlling the imaging operation of an imaging unit 120. The interchangeable lens 20 includes a shake detection unit 201 for detecting shake in the camera system 1, an image blur correction device 210 for adjusting the optical path from a subject to the camera body 10 and thereby correcting the blurring of an image caused by shaking of the camera system 1, and the lens microcomputer 200 capable of sending and receiving information to and from the sequence microcomputer 100, and for controlling the drive of the image blur correction device 210 according to the amount of shake detected by the shake detection unit 201. The lens microcomputer 200 actuates the shake correction device 210 once a specific amount of time has elapsed since a command for actuating the image blur correction unit was received from the sequence microcomputer 100.