Patent ID: 7844173

Claim:
An image capturing device, comprising: a mirror unit disposed on an optical axis of object light made incident from an imaging optical system corresponding to a first position of the mirror unit when the image capturing apparatus is in an optical viewfinder (OVF) mode; a phase difference detection unit configured to receive the object light having an optical path changed by the mirror unit using a ranging sensor and generate a phase difference detection signal; a first focusing unit configured to perform a first focusing operation on a first area on the basis of the phase difference detection signal; a controller configured to move the mirror unit away from the optical path corresponding to a second position of the mirror unit when the image capturing apparatus is in an electronic viewfinder (EVF) mode; an image sensing device configured to receive object light made incident from the imaging optical system and generate an image signal relating to an object image when the mirror unit is moved into the second position; a second focusing unit configured to perform a second phase difference focusing operation on the basis of an output signal acquired from a second area defined in the image sensing device; and a processor configured to control the electronic viewfinder to simultaneously display a preview image on the basis of a plurality of image signals sequentially generated by the image sensing device, the first area for which phase difference detection is performed using the ranging sensor, and the second area for which phase difference detection is performed based on an output signal of the image sensing device.