| 摘要 |
PURPOSE:To perform correction of aperture by a high degree of zooming by performing controlling of two-dimensional and three-dimensional aperture in the zooming lens whose aperture varies with zooming by a microcomputer in which the fluctuation quantities of the aperture have been stored. CONSTITUTION:Turning quantity of a cam tube 4 in the zoom lens is converted to quantity of electricity by a potentiometer P1 is then inputted to a microcopmputer (MC) 11. The functions of fluctuations of aperture diameter or aperture position corresponding to respective focal lengths of the zoom lens have been stored in the memory element such as ROM or other of this MC 11. An input for addressing of which function output of the relations of the change of each aperture is to be taken, namely, e.g., aperture diameter information used, is inputted to the MC 11. The output of this MC is inputted to a servo driving circuit 12, by which the motor M controlling aperture blades 8 is controlled. |
