A few months ago, I wrote an entry about the camera obscura , in which he explained the basic principle of photography, which is but the formation of an inverted image by passing light through a tiny hole in a dark room.

Based on this principle can make a pinhole camera without more material than a cardboard box and a photosensitive paper. If you want to know in detail the steps to do it, you can see the video below, which manufactures a pinhole camera and reveals a picture taken with her.

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