Patent ID: 7385640
Filing Date: 2008-06-10
Classification: H04N

Abstract:
1. A camera system comprising: a camera; and a lens apparatus which has an image taking optical system including a focusing lens and which is mounted on the camera, wherein the camera has (a) a photoelectric conversion element which photoelectrically converts an optical image formed by the image taking optical system, (b) a focus information producing section which produces focus information of the image taking optical system based on the output of the photoelectric conversion element, and (c) a communication unit which transmits timing information of the photoelectric conversion by the photoelectric conversion element and the focus information to the lens apparatus, wherein the lens apparatus has (a) a detector which detects a position of the focusing lens, (b) a memory which stores an optical information of the image taking optical system, the optical information changing according to the position of the focusing lens and corresponding to the position of the focusing lens at the time indicated in the timing information transmitted from the communication unit, and (c) a controller which controls the driving of the focusing lens, and wherein, during the driving of the focusing lens, the controller calculates a target driving amount of the focusing lens by using the focus information produced by the focus information producing section and the optical information stored in the memory.