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How does a pinhole camera work?

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I have seen things called "pinhole cameras," and I have even seen pictures taken by them. How do they work? Why don't they need a lens to focus the image? read more

A pinhole camera is the simplest camera possible. It consists of a light-proof box, some sort of film and a pinhole. The pinhole is simply an extremely small hole like you would make with the tip of a pin in a piece of thick aluminum foil. A pinhole camera works on a simple principle. read more

A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect. read more

To make a pinhole camera, any size box will do, but a larger box will work best. You'll need to cut at least one square hole on the short side of the box. You then tape tin foil over the hole, and use a toothpick to poke a small hole in the foil. read more

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