Interchangeable lens, camera body, and camera system

Abstract

An interchangeable lens has a zoom lens, a zoom driver operable to drive the zoom lens along an optical axis, a focus lens, a focus driver operable to drive the focus lens along the optical axis, and a storage unit operable to store link information which links position information indicating a position of the zoom lens on the optical axis with information about a variation in magnification caused by the focus lens advancing and retreating on the optical axis with the zoom lens located at the position indicated by the position information.

1 . An interchangeable lens comprising:
 a zoom lens operable to change a size of a subject image;   a zoom driver operable to drive the zoom lens along an optical axis;   a focus lens operable to change a focus state of the subject image;   a focus driver operable to drive the focus lens along the optical axis; and   a storage unit operable to store link information, the link information including a plurality of magnification variation information and a plurality of position information, each of the position information indicating a position of the zoom lens on the optical axis, each of the magnification variation information representing a variation in magnification caused by movement of the focus lens advancing and retreating on the optical axis when the zoom lens is at a position indicated by position information, the link information linking the position information with information about the variation in magnification, wherein   the magnification variation information is obtained based on a predetermined movement amount of the focus lens advancing and retreating on the optical axis.   
     
     
         2 . An interchangeable lens comprising:
 a focus lens operable to change a focus state of a subject image;   a focus driver operable to drive the focus lens along an optical axis; and   a storage unit operable to store magnification variation information, the magnification variation information representing a variation in magnification caused by movement of the focus lens advancing and retreating on the optical axis, wherein   the magnification variation information is obtained based on a predetermined movement amount of the focus lens advancing and retreating on the optical axis.