| 摘要 |
PURPOSE:To improve focusing accuracy and to shorten focusing time without using a special circuit by setting a range-finding frame used in a 2nd focusing means before focusing operation by the 2nd focusing means based on information obtained by focusing operation by a 1st focusing means. CONSTITUTION:An arithmetic circuit 7 obtains the deviation and the deviation direction of a focusing lens la from a position where a subject image is focused on the plane of a photoelectric conversion element 2 by an autocorrelation system by arithmetic operation. Based on the obtained deviation and the deviation direction of the lens 1a, a CPU 12 outputs a signal for driving the lens 1a from a present position to a position on this side of a focusing point by a specified amount to a motor 8 for driving the lens 1a, and the lens Ia is driven. The reason why the lens 1a is driven to the position on this side of the focusing point by the specified amount is to eliminate the need of obtaining the driving direction of the lens 1a again in the case of shifting the focusing means by a climbing system. Simultaneously, the state of a subject is judged by performing focusing operation by the autocorrelation system. |
