Pinhole: Another World Eric Renner and Nancy Spencer If you want to play with your intuitions and you're interested in a more mysterious image, pinhole might be what you want. Pinhole can also be a very inexpensive and easy way to obtain a large negative, useful for non-silver printing. You don't need to know f stops, worry about whether your battery is working, or carry around a lot of different lenses. What you'll need is a sense of humor and an appreciation for discovery!
To do pinhole, all you really need is a light-tight box. Almost anything can be turned into a camera. All kinds of light-sensitive materials (both black and white and color film and photo paper) will work. And it's easy to make a pinhole, or pinholes for multiple imaging.
For your first pinhole camera, you might want to choose a container that seems easy to turn into a camera and can be spray-painted with flat black inside, and one to which a pinhole can be easily attached. The most readily available material for the pinhole is the thin aluminum disposable cookie sheets or pie pans available in any supermarket. You will want to get a small sewing needle and "drill" (hold the needle and spin the metal) a hole in the metal so that about 1/8" of the needle pierces the metal. The burr on the back side should be sanded off with fine sandpaper, #600 grit emery paper works well. The pinhole should be taped over a hole cut in the container. Make sure that hole in the container is large enough so that light from the pinhole isn't partially blocked by the container. Black plastic vinyl electrical tape works well as tape for the container's lid and for attaching the pinhole. If you want to spend more money for a higher quality tape use black photographic tape (Scotch #235) available in good photo stores.
An image comes through the pinhole at about a 150 degree angle, which in photo terms is a very wide angle. If the distance from the pinhole to the film is 3" that means that this wide angled pinhole image circle hitting the film will be 10" in diameter or so. If you use a 6" deep suitcase as a camera you can get a 20" wide image. (The diameter of the image is approximately 3-1/2 times the distance between the film and the pinhole.)
Using various focal length (distance from pinhole to film) cameras with the same size 4" x 5" film gives you superwide, wide, or normal angles of view. An example of this is Figure 1.1. To make these three images, the three different focal length 4" x 5" Leonardo Cameras were used by Nancy Spencer.
| Figure 1.1 |  |  |  | | ©Nancy Spencer, 1 1/2" Leonardo Superwide | ©Nancy Spencer, 3" Leonardo Wide | ©Nancy Spencer, 6" Leonardo Normal |
If you don't want to make a camera, there are quite a few large format (120, 4"x5" and larger) pinhole cameras available commercially, many of these are meant for use with filmholders and Polaroid backs. You can also turn your existing lens cameras into pinhole. For instance, if you have a 35mm camera, just remove the lens and use a body cap with a large hole in it over which you have taped the pinhole. Micro drilled pinholes are also available commercially. All of the above cameras and accessories are available from the Pinhole Resource. A wide variety of information can be obtained in monographs and books on pinhole photography.
If you decide you want a fairly sharp pinhole image, you will need to know that the greater the distance between the pinhole and the film, the larger the hole should be. A few examples are: a 1/4mm pinhole for 1-1/2" focal length camera; a 1/3mm pinhole for 3" focal length camera; a 1/2mm pinhole for a 6" focal length camera. For more detailed information, Pinhole Photography: Rediscovering a Historic Technique by Eric Renner (Focal Press, 1999) is useful. To make the image less sharp, the hole should be larger than the recommended optimal size. Even a hole the size of a thumbtack shaft will make a recognizable image in a 6" camera.
The farther the light travels inside the camera, the weaker the light becomes. In other words, the 6" suitcase pinhole camera described above will take longer to expose than a 3" camera. There are many ways to judge exposure times. We suggest trial and error, although to give you an idea Tri-X film in a 3" camera with a 1/3mm pinhole exposes in 6-9 seconds in full sun.
You might want to try photo paper for your first images. If you do, you'll find RC multigrade mat paper is ideal for gray days. RC also dries perfectly flat for contact printing to make positive prints. (If you use RC glossy paper in a curved back camera, you sometimes will get an undesirable reflection down the middle of the paper.) For your first images, you might want to keep your camera still by placing it on a wall or on the ground, or on a tripod if your camera has a tripod mount. Also, do not allow the sun to hit the pinhole because it overexposes the film, although later on you may want to experiment with its spectral effects, unusual in both black and white and color.
Pinhole has a remarkable history in both science and art. Pinholes in the ceiling of many early cathedrals in Europe were used for telling time in the middle ages, and in fact the Gregorian calendar (1582) was achieved through use of pinhole imaging of the sun at the Tower of Winds in the Vatican in Rome. Leonardo da Vinci, Rene Decartes, Albrecht Durer, and Isaac Newton all used pinhole for research. The first photographic pinhole images probably came from the 1850's. In the 1890's pinhole photography was widely used to achieve "atmospheric" soft focus imaging. The first disposable camera "The Ready Fotografer" was pinhole, manufactured in 1892. The Nobel prize winner, Lord Rayleigh, researched pinhole in the 1880s to achieve the optimal pinhole formulas still used by scientists today.
In the past two decades, a great amount of fascinating pinhole imagery has been made by many photographers throughout the world. A selection of pinhole photographs and cameras can be seen in our Select Images from the Permanent Collection. Thomas Bachler of Germany made pinhole images by placing film in his mouth and forming his lips into a pinhole. When the Berlin Wall came down, Marcus Kaiser used holes in the wall as the vessel for his camera, placing a film holder taped to one side of the hole, and a pinhole taped to the other side of the hole. He then reversed the procedure, so that he could make pinhole images of both East and West Berlin. Dominique Stroobant of Italy made six month long pinhole exposures of the sun crossing the sky. Anyone interested in seeing a huge variety of pinhole images can find them in Pinhole Journal, our magazine dedicated to pinhole photography. |
