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Turn A Pumpkin Into A Camera, How?

February 1, 2011


The above video shows how you can use a pumpkin to take pictures, isn’t that amazing. In fact you can use any object or box, make it lightproof , punch a tiny hole, put a film inside it and you have got a lens-less pinhole camera. The concept of pinhole camera can be traced back to 4th century BC; the idea was explained in detail and published in 1021 AD in the Book of Optics by Arab scholar Alhazen. Light from outside world enters the box and forms an inverted image of the object on the film.  When an object is placed outside the box and light is shown on it, different parts of the object send different amount of light inside the box, some are more bright, some are less, resulting in formation of an inverted image on the film. Smaller the hole, sharper the image but it also makes the image dimmer. The exposure times can be lengthy and can range from few seconds to hours. You can optimize the size of the pinhole by doing some calculations and thereby also determine the f-number and exposure time of your camera. It’s not that easy to get everything right while working with pinhole cameras, so patience will be required before you get a good shot, but it will be worth it!

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