Really? Can it be? We can make cameras out of paper that work?
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Find the above camera (and others) at the Corbis Readymech
website. Each camera can be downloaded as a free pdf pattern that you print on to "several sheets of good printer paper" and then put together using an illustrated instruction guide of only 14 steps.
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(The happy film canisters above are just part of the instruction guide that I especially liked.)
Above is a dreamy example of an actual picture taken with the World Pinhole Camera Day Camera, courtesy of the Corbis photo gallery.