| 摘要 |
A surveying instrument is provided with a sighting telescope, an auto-focusing system, a switch and a correction system for correcting a focusing state. The correction system controls the auto-focusing system, in response to an operation of the switch, to change a focusing state of the image of the sighting telescope from a first state to a second state. The first state is a state where an object whose object distance is a first distance is focused on, and the second state is a state where an object whose object distance is a second distance is focused on, wherein the second distance is substantially a half of the first distance.
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