|
The modern camera is a wonderful thing, but it's
nice to remember how simple the mechanism can be. You can strip
away the technology until there is little left but the
abstraction on which the machine is based. A simple manipulation
of space, a few materials, and a couple of hand tools and the
magic (physics) is at your fingertips without sophisticated
engineering.
To simplify these cameras as much as possible I
made them out of the 11x14 inch photo-paper itself. There is no
film in the camera because the camera is the film. Like a salad
bowl made of lettuce leaf, and consumed with the meal, the
camera doesn't exist after its utility is fulfilled. There is no
machine. It is more of an arrangement than a thing.
Since it is color paper, sensitive to the full
spectrum of visible light, there is no "safe" light recommended
for darkroom work. Each paper box camera is cut, folded, and
constructed in the dark and kept in a dark bag until its moment
in the sun has come.
The pinhole in the brass plate is all that is
needed to project an image into the inside surface of the box
(more on that later), but light also seeps through the cracks
and flaps of the box construction and soaks through the black
tape that holds the whole thing together. The streaks and burns
and flares that appear on the final image are the result of this
ambient radiation and although it can be somewhat controlled, it
also depends largely on "random" factors.
Back in the darkroom, the brass lens plate is
folded back like a hatch-cover in the Mark I (the Rectangle),
revealing the hole in the box. In the Mark II (The Square) the
lens plate caps the apex of the pyramid and can be removed by
tearing away the tape that holds it in place. A funnel is placed
in the hole and the camera becomes like a leaky juice carton as
the chemicals are poured in and sloshed around for a couple of
minutes each. Rigorous adherence to optimal chemistry technique
is already out the window here, so I decided not too worry too
much as long as the times and temperatures were in the ballpark.
Finally, with the lights on, the whole box is
immersed in a pan of water, the black masking tape is peeled off
and the box is opened flat to display its inner surface.
The first design, subsequently called the Mark
I, is shaped like a camera. It allows for a largish rectangle as
the main image area in the center of the paper and provides an
overlap of paper at the front, which I figured would help in
achieving a properly squared-up and light-tight construction
working by touch alone. It also uses up a great deal of paper as
box flaps.
The Mark II is the design that puts the maximum
surface area on the back wall of the box. The light passing
through the pinhole is conical in structure and the pyramid
conforms with this, wasting no paper on the front corners. It is
also a little easier to build in the dark, requiring 12 instead
of 22 cuts. It is simpler to align and tape up, and easier to
open when done.
These are extremely wide-angle pictures. the
angle of view seems to be about 170° as the image wraps around
the inside of the box almost all the way back to the aperture.
There is no "fish-eye" optical distortion as with a wide-angel
lens because light travel through a pinhole in a straight line
whereas a glass lens bends light as it gathers it. the
distortion that is evident here is caused by the various planes
of the box sides intersecting the sphere of light at different
angles. This stretches sections of the field of view like a
mercator map projection.
Like a mirror, the scene is flipped left to
right, which is why a familiar location may not look quite
right. (more)
<< Back |