1. An image pickup apparatus comprising: an image pickup device that shoots a subject to acquire image data on the subject; a controller that drivingly controls a focus lens to cause said image pickup device to perform automatic focusing; a face information detecting device that detects information on a face of the subject from the acquired image data; a distance estimating device that estimates a subject distance from said image pickup device to the subject based on the detected information on the face; and a depth-of-field calculating device that calculates a depth of field, wherein a range over which the focus lens is driven varies according to the estimated subject distance and the calculated depth of field.