| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem on difficulty in manufacture technique and high cost, because only a method such as improving the resolution of an encoder or providing two sets of focus lenses having different photographing sensitivity is considered in the case of improving the speed and the accuracy of an automatic focusing device. SOLUTION: By providing a 1st focus mechanism for performing focusing operation by driving a photographic lens and a 2nd focus mechanism incorporated in a camera, the compatibility of the speed with the accuracy is realized and the camera system made low in cost is obtained. |
