Abstract: A pair of integration-type light-receiving sensors receive the light from subjects and produce a subject image signal. A light projecting section projects light onto the subjects. A steady-state light removing section obtains an image signal by removing the steady-state light component from the subject image signal the pair of integration-type light-receiving sensors produces, while the light projecting section is projecting light onto the subjects. A first distance-measuring section measures a subject distance on the basis of the subject image signal from the pair of integration-type sensors. A subject position estimating section causes the first distance-measuring section to make distance measurements for a specific time and, on the basis of the resulting reflected light image signal, estimates the position of the main subject.