66 THREE-DIMENSIONAL PHOTOGRAPHY
Fig. 4-5.d,
Fig. 4-6.E 1.
B and C, we may use the right side of the diagram for the new
condition to prevent too' great confusion in the drawing.
The points D, F and G are fixed in the image, so when the im-
age (print) is moved nearer the lenses as it must be when these
have shorter focal length, we find that the outer rays D and G