| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform high-accuracy tracking control.SOLUTION: A second movement frame 2 of a second lens unit L2 is moved from a position at which it is in contact with a first movement frame 1 to a design wide end by rotating a cam ring, and an image-capturing element 9 and a fifth movement frame 5 also are moved to a design wide end corresponding thereto. If one of an angle of view and a focal distance is outside a permissible range at the design wide end, the second movement frame or the image-capturing element is moved by an amount equal to the divergence, and the fifth movement frame is also moved so as to maintain an in-focus state. Then, the second movement frame, the image-capturing element, and the fifth movement frame are moved to a telephoto end that is corrected on the basis of the corrected wide end. Tracking data is corrected on the basis of the corrected position of the wide end and telephoto end.</p> |
