| 摘要 |
A finder optical system for observing an object therethrough, includes a variable-power objective optical system, an eyepiece optical system for guiding light from the object via the objective optical system to an observer, and an adjustor for changing the optical characteristics of an image of the object observed by the observer through the eyepiece optical system based on information about the temperature of the finder optical system, the distance from the finder optical system to the object, and the zoom position of the objective optical system.
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