DIGITAL CAMERA AND AUTOFOCUS DEVICE

PROBLEM TO BE SOLVED: To prevent increase in cost due to AF processing of a phase difference detection method, without enlarging the size of a device. SOLUTION: A diaphragm mechanism 31 of a digital camera is composed of a first diaphragm blade 60, second diaphragm blade 61, first lever 62, second lever 63, and case 64. The case 64 has an aperture 82 the center of which is matched on an optical axis of a taking lens. The first diaphragm blade 60 has an AF aperture 84. Each lever rotates, in response to drive of an iris motor 34, and slides and moves each of diaphragm blades 60, 61. The diaphragm mechanism 31 changes into a first AF state, where the center of the AF aperture 84 is shifted to the right against the center of the aperture 82 and the AF aperture 84 is superposed on the aperture 82, and a second AF state shifted to the left and superimposed thereon, by the slide movement of each of diaphragm blades 60, 61. The digital camera performs the AF processing of the phase difference detection method, on the basis of image data acquired in each AF state. COPYRIGHT: (C)2009,JPO&INPIT