Lastly, it is necessary to provide a finder for this camera in
order to know what picture you are taking. Make a little frame of
wire, the size of the plate you are using, and mount it upright
(see Fig. 5) on top of the camera as close to the end where the
pin hole is as you can. At the other end, in the center, erect a
little pole of wire half the height of the plate. If now you look
along the top of this little pole, through the wire frame and see
that the top of the little pole appears in the center of the
frame, everything that you see beyond will be
[Illustration: Pin Hole and Shutter Construction]
taken on the plate, as will be made plain by looking at the dotted
lines in Fig. 5, which represents the outer limits of your vision
when confined within the little frame.
[Illustration: Explanation of Action of Pin Hole]
When you want to use this camera, take it into an absolutely dark
room
[Illustration: Constructing a Finder for Camera]
and insert a plate (which you can buy at any supply store for
photographers) in the end where the slides of wood are, and
between them and the back of the box.
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