An imaging device is provided that includes a lens mount, an imaging element, a system controller, a sensor and a rotation corrector. The rotation corrector is configured to reduce change in the positional relationship between the optical image and the imaging element caused by movement of the imaging device around an axis parallel to an optical axis of the lens unit. The lens unit has a first optical system that forms a first optical image from a first perspective on the imaging element and a second optical system that forms a second optical image from a second perspective on the imaging element. The system controller is configured to halt operation of the rotation corrector when the lens unit is supported by the lens mount.