Patent ID: 8648961

Claim:
An image capturing apparatus having an automatic focusing function for automatically focusing on an object to be photographed, the image capturing apparatus comprising: a first image-obtaining unit that includes a picture-taking lens, the picture-taking lens including a focusing lens, and a first imaging sensor and obtains first image data by photoelectric conversion, performed by the first imaging sensor, of a first image of the object formed through the picture-taking lens; a second image-obtaining unit that includes a range-finding lens and a second imaging sensor and obtains second image data by photoelectric conversion, performed by the second imaging sensor, of a second image of the object formed through the range-finding lens; a range finder that calculates a distance to the object by using the first image data and the second image data; and a focus control unit that moves the focusing lens according to the distance calculated by the range finder to attain focus on the object, wherein the range finder includes: an image-forming-position determining unit that determines a first image forming position, at which the first image of the object is formed on a light-receiving surface of the first image sensor, and a second image forming position, at which the second image of the object is formed on a light-receiving surface of the second image sensor; and a distance calculating unit that calculates a distance to the object based on the first image forming position and the second image forming position.