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)

(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.


Subscribe




Video of the Day

Categories

Archives

Recent Posts

My Links

Pages

Google News
U.S. : Top News

RSS CNN IBN News

Tag Cloud

Music Video of The Day

RSS TED Talks

Born on this day

February 25, 2020
1841 Pierre Auguste Renoir
1901 Zeppo Marx
1943 George Harrison
1937 Sir Tom Courtney
1938 Herb Elliott
1941 Lord (David) Puttnam
1945 Elkie Brooks
1964 Lee Evans
1967 Nick Leeson
Joe's