Three-Dimensional Photography - Principles of Stereoscopy

8 THREE-DIMENSIONAL PHOTOGRAPHY

Fig. 1-4. For instantaneous stereograms, the Ster-

eotach is applied to the Polaroid-Land camera.

that when properly used, the results are satisfactory. Inasmuch
as the negatives may be printed or color films viewed just as they
come from the developing laboratory, without transposing, they
provide an ideal equipment for the beginner in stereography. It
is only fair to add, however, that the resulting quality is not as
good as that obtained with a conventional stereo camera.
When a high precision reflector is used, such as that advised
for motion picture work, the quality is better. But as such a
reflector costs as much or more than a good stereo camera, its
use is pointless for still work.

making the exposure, give full attention to the brightness range
of the subject and do not attempt to make an exposure without
compensation if this range is excessive. It is desirable that the
meter be used to obtain a differential reading, and that the ex-
posure given be that demanded by the shadow areas. This is no
longer a question of the shadows “which contain desirable detail,”
but of the deepest shadow included, regardless of whether it is
important or not. Any shadow lacking detail will later be seen as

PHOTOTECHNICAL CONSIDERATIONS. (B LACK- AND - WH I TE) .-In