Abstract: An imaging device includes: an imaging element having an imaging plane for light from an object to enter; a switching mechanism that switches a first transmissibility state and a second transmissibility state therebetween by varying transmissibility for the light entering the imaging plane using optical filters, a processor that controls the imaging element and the switching mechanism; and a memory that stores therein instructions to be executed by the processor. The instructions include: determining whether the first transmissibility state or the second transmissibility state is established; in the first transmissibility state, acquiring a first setting range that indicates an aperture value or a focus settable in the first transmissibility state; in the second transmissibility state, acquiring a second setting range that indicates an aperture value or a focus settable in the second transmissibility state; and limiting the aperture value or the focus based on the first or second setting range.