Luminance components of image profile portions are extracted from luminance components (Y components) included in image data corresponding to an image within a focus frame. A profile component evaluation value is obtained by totalizing the absolute values of two-dimensionally-differentiated values of the extracted components. A distribution graph of a focus lens position and the profile component evaluation value is generated. A finder image is displayed by combining a photo-object image and the distribution graph. At this time, a bar corresponding to a current focus lens position is displayed in a different color from that of other bars in the distribution graph.