PROBLEM TO BE SOLVED: To provide a revolver which does not rotate unintentionally even when an unexpected force is applied in the rotation direction of the revolver just as the case in which the revolver is inclined, and an observation device equipped with the revolver.;SOLUTION: The revolver of the observation device which includes a revolver rotating body equipped with a plurality of objective lenses, and a supporting part rotatably supporting the revolver rotating body includes a state switching means 12 which switches the state where the rotation against the supporting part of the revolver rotating body is possible to the state where the rotation against the supporting part of the revolver rotating body is prevented.;COPYRIGHT: (C)2010,JPO&INPIT
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