Patent ID: 7852575

Claim:
A lens apparatus attachable to and detachable from a camera apparatus, comprising: a zoom lens; an optical mechanism disposed in the camera-apparatus-side of the zoom lens and including a focus lens which moves for focusing; a receiving unit that receives a driving instruction for driving the optical mechanism from the camera apparatus; a detecting unit that detects position information of the optical mechanism; a lens CPU that outputs a position instructed value of the optical mechanism in accordance with the driving instruction, and calculates a position of the optical mechanism; a driving unit that drives the optical mechanism based on the position instructed value output from the lens CPU; and a transmission unit, wherein the transmission unit transmits the driving instruction or data calculated on the basis of the driving instruction to the camera apparatus when the driving unit does not drive the optical mechanism and the camera apparatus performs the image taking operation for the object whose image is to be taken, wherein the driving unit drives the optical mechanism to a discrete position.