An imaging apparatus may include an
infrared cutoff filter capable of being inserted into and extracted from an incident light path to an
image sensing device, and may further include a first detecting unit configured to, when the
infrared cutoff filter is off the incident light path to the
image sensing device, detect whether the difference between current
illuminance of a subject acquired from an
image signal of the subject sensed by the
image sensing device and a reference value of the
illuminance of the subject determined after the
infrared cutoff filter was extracted is equal to or greater than a first threshold value, and a filter
control unit configured to, when the first detecting unit detects that the difference between the current
illuminance and the reference value is equal to or greater than the first threshold value, insert the infrared cutoff filter into the incident light path.