AUTOMATIC FOCUSING DEVICE, DIGITAL CAMERA AND PORTABLE INFORMATION INPUT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an automatic focusing device capable of accurately detecting a focusing position in a short time and realizing focusing position detecting operation in compliance with user's taste and a photographing purpose. SOLUTION: This automatic focusing device is equipped with a lens system 101 including a focus lens system 101a forming a subject image at a specified position and a zoom lens system 101b, a CCD 103 picking up the subject image inputted through the lens system 101 and outputting image data, and a CPU 121 deciding a final focusing position based on the detected result of CCD-AF and external AF. The operating condition of the CCD-AF and the external AF can be set by a user.