초록 ▼

Data related to an object distance which is sent from a camera apparatus is captured. A focus lens position instructed value CL is calculated based on an object distance instructed value CD and a zoom position information value ZP. An object distance returned value PL to be transmitted to the camera

Data related to an object distance which is sent from a camera apparatus is captured. A focus lens position instructed value CL is calculated based on an object distance instructed value CD and a zoom position information value ZP. An object distance returned value PL to be transmitted to the camera apparatus is obtained based on a current lens position CF and the zoom position information value ZP. Whether the focus lens position instructed value CL is equal to the lens position CF or not is determined. When the focus lens position instructed value is not equal to the lens position, a focus lens is moved in accordance with the focus lens position instructed value CL is performed. When the focus lens position instructed value is equal to the lens position, lens driving processing is not performed.

대표청구항 ▼

What is claimed is: 1. 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 instructio

What is claimed is: 1. 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. 2. A lens apparatus according to claim 1, wherein the driving unit varies a driving amount of the focus lens in accordance with a position of the zoom lens. 3. A lens apparatus according to claim 1, wherein the number of the discrete positions change in accordance with a position of the zooming lens. 4. A lens apparatus according to claim 1, wherein the data transmitted to the camera apparatus by the transmission unit is continuously-changing data in accordance with a variation of the driving instruction. 5. A lens apparatus according to claim 1, wherein the driving unit drives the optical mechanism on the basis of a position instruction value derived from the driving instruction. 6. A lens apparatus according to claim 5, wherein in a case that the position instruction value is directed to the position detected by the detecting unit, the transmission unit transmits the driving instruction to the camera apparatus. 7. A lens apparatus according to claim 5, wherein in a case that the position instruction value is not directed to the position detected by the detecting unit, the transmission unit transmits information including the position of the optical mechanism detected by the detecting unit to the camera apparatus. 8. A lens apparatus according to claim 1, wherein the driving instruction includes a distance to the object. 9. An image taking apparatus, comprising: a lens apparatus; and a camera apparatus attachable to and detachable from the lens apparatus, wherein the lens apparatus comprises: 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 focus lens to a discrete position. 10. An image taking apparatus according to claim 9, wherein the driving instruction includes a distance to the object.