Cash Advance Loans Cash Advance Loans

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!

Filed under: Science,Video

Tags: ,

Leave a Comment


(required), (Hidden)

XHTML: You can use these tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

TrackBack URL  |  RSS feed for comments on this post.


Video of the Day



Recent Posts

My Links


Google News
U.S. : Top News


Tag Cloud

Music Video of The Day


Born on this day

August 9, 2020
1905 Leo Genn
1922 Philip Larkin
1927 Robert Shaw
1938 Rod Laver
1944 Sam Elliott
1945 Ken Norton
1957 Melanie Griffith
1963 Whitney Houston
1968 Gillian Anderson