"FIGS. 3A and 3B show diagonal rear view images in outline photographed with the video camera 1 in the condition of FIG. 2 and displayed within the frame of an image plane 10 inside the video camera 1, of which FIG. 3A is an image taken at the time of t?????t, and FIG. 3B is an image taken at the time of t." . . . .