Patent ID: 8730381

Claim:
An image pickup system including a camera and an interchangeable lens to be detachably attached to the camera, the interchangeable lens having an image-taking optical system that includes a magnification-varying lens being moved in an optical axis direction to perform variation of magnification and a compensating lens being moved in the optical axis direction to reduce focus variation caused due to the variation of magnification, wherein the camera comprising: an image sensor configured to photoelectrically convert an object image formed by the image-taking optical system; an image sensor driver configured to move the image sensor in the optical axis direction; and a camera controller configured to control movement of the image sensor through the image sensor driver such that the focus variation caused due to the variation of magnification of the image-taking optical system is reduced, wherein the camera controller is configured to acquire image sensor moving data corresponding to the interchangeable lens attached to the camera, and controls the movement of the image sensor by using the image sensor moving data, wherein a trajectory where the image sensor moves in zooming is satisfied by the image sensor moving data, and the trajectory is different from those of the magnification-varying lens and the compensating lens.