Introduction to pinhole photography

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this is the slide show which accompanied my presentation for World Pinhole Day 2013 at the Harlow Gallery in Hallowell, Maine

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  • 1. Introduction to Pinhole Photography For World Pinhole Photography Day Sunday, April 28, 2013

2. Mo Ti was one of the first people to use a camera obscura. This was estimated to have been around the fifth century B.C. 3. The camera obscura worked by light entering through a small pinhole which hits the wall inside, forming a faint image which can be traced. 4. When the image is projected,, it appears upside down. 5. Arab Physicist, Alhazen discovered that the smaller the pin hole the sharper the image came into focus. 6. Daniello Barbaro discovered that replacing the pinhole with a glass lens gave the image a brighter and sharper focus. 7. In the 17th century scientists and artists developed portable camera obscuras. Early versions of which were simply light-proof tents with lenses sewn into the walls. 8. Camera obscura, from a manuscript of military designs. 17th century, possibly Italian. 9. Later versions were long wooden boxes that projected an image onto a piece of frosted glass built into the lid. 10. 4 drawings by Canaletto, representing Campo San Giovanni e Paolo in Venice, obtained with a Camera obscura. 11. "View from the Window at Le Gras" (circa 1826Joseph Nicphore Nipce. He called this process "heliography" or sun drawing the exposure time was about 8 hours. 12. Louis Jacques Mande DAGUERRE (1787-1851) 13. Sir David Brewster (11 December 1781 10 February 1868) 14. Brewster Stereoscope 15. Pictorialists: Nearly all the greatest work is being, and has always been done, by those who are following photography for the love of it, and not merely for financial reasons. - Alfred Stieglitz, 1899 16. Eric Renner Grandma Becomes the Moon pinhole photograph, 1978 17. According to Renner (1995: 117) most formulas used today are of the following general form: r = pinhole radius l = wavelength of light c = a constant, usually a decimal fraction between 0.5 and 1 f = focal length 18. Exposing paper In order to calculate an exposure time, it is important to know the f number of the pinhole camera. Compared with normal cameras, it does not change (the hole is the same size) and the calculation is simple: the distance from the light-sensitive material divided by the diameter of the hole. For example, the formula for a pinhole camera with a focal length of 100 mm and a pinhole 0.4 mm in diameter is: 100/0.4 = 250, hence the f number is 250. 19. Francesco Capponi www.francescocapponi.it 20. http://caffenol.blogspot.com/ Caffenol Dedicated to the power of Caffenol and Caffenol-C film developer made of: instant coffee, washing soda and vitamin-C. Competes with the best developers available This developer deserves more attention. Time for a cup of coffee.... 21. Manfred Bucheit 1979 22. Pinhole Blenders 23. Rene Smets 360 panorama pinhole 24. Rene Smets 25. Jefrey Pelagio Jacob 26. Hanes Art Center at the University of North Carolina at Chapel Hill. This was a collaborative project done in Professor elin o'Hara slavick's Conceptual Photography class after reading David's Hockney's book SECRET KNOWLEDGE. There was originally a steep tin roof with a spinning turbine at the top, but UNC administrators demanded it be changed. 27. Diane Martin Peterson Warped..pinhole on paper..rounded tin gives the warped appearance... 5 minutes in caffenol 28. Polaroid Pinhole Image 29. Solargraphy 30. World Pinhole Day Agenda: Program ends: break for lunch and/or Head to the Woods and start shooting there. Noonish: meet at the Homestead for shooting in and around the buildings

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