An interchangeable lens unit includes a second lens group unit, a focus lens unit, a fourth lens group unit, a zoom ring unit, a focus motor, and a photosensor. The electrodes are spaced apart in each pixel cell, and the sustain electrode and the scan electrode are each cut away between pixel cells arranged in the row direction to provide each pixel cell with individually separated electrodes. The front sleeve is connected with the drill body, wherein the nut sleeve is connected to the nut and extends backwards in a rear end having a plurality of projecting keys. A carrier substrate is coupled to the first object wherein the first object is being recessed below a surface of the carrier substrate. The method of the present invention specifically includes analyzing user characteristics including factors such as his physical movement, location and mobile station communication type, as well as angular placement.