1. A camera comprising: a lens barrel, which is provided on its periphery with a focusing ring incorporating a focusing lens and being freely rotatable, for adjusting the position of the focusing lens in accordance with rotation of the focusing ring, and said lens barrel is provided on center of the front of the camera; a solid-state electronic image sensing device for capturing the image of a subject, which is formed by the focusing lens, and outputting image data representing the image of the subject; a display unit for displaying on a display screen an image within a desired AF target area in the image of the subject represented by the image data that has been output from said solid-state electronic image sensing device; a finder unit formed on the front of the camera at the upper right thereof and having an objective window facing a subject and an eyepiece window for looking at an optical image of the subject seen through the objective window; a deflecting unit, which is provided between the objective window and the eyepiece window, for introducing the image within the AF target area, which is being displayed on the display screen of the display unit, to the eyepiece window; rotation-amount detection means for detecting amount of rotation of the focusing ring; and display control means for controlling said display unit, based upon amount of rotation detected by said rotation-amount detection means, so as to display the image within the AF target area on the display screen in such a manner that, if the image within the AF target area is out of focus, the optical image of the subject seen through the objective window and the image within the AF target area will be offset from each other on an axis connecting optical axis of said lens barrel and optical axis of said finder unit, and so as to display the image within the AF target area on the display screen in such a manner that, if the image within the AF target area is in focus, the optical image of the subject seen through the objective window and the image within the AF target area will coincide.