| 摘要 |
An autofocusing apparatus of a telescope for automatically focusing on an object viewed within a field of view of the telescope through a distance-measuring zone arranged in the field of view, includes: a multi-point distance measuring device which divides the distance-measuring zone into at least three distance-measuring zones to detect an object distance on each of the distance-measuring zones; a lens driver which drives a focusing lens group of the telescope along an optical axis thereof; and a controller which controls the lens driver wherein the focusing lens group is moved to perform an autofocusing operation in accordance with a result of the each object distance detected by the multi-point distance measuring zones. The controller compares the each object distance detected by the multi-point distance measuring device with each other. If the controller determines that two object distances respectively detected on two distance-measuring zones among the aforementioned at least three distance-measuring zones are substantially the same, the two distance-measuring zones being separate from each other by at least one distance-measuring zone positioned therebetween, and that an object distance detected on one of the at least one distance-measuring zone is substantially double the distance of each of the two object distances which are substantially the same, the controller determines that each of the two object distances is a valid object distance so that the autofocusing operation is performed in accordance with the valid object distance.
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