introduction to pinhole photography
DESCRIPTION
this is the slide show which accompanied my presentation for World Pinhole Day 2013 at the Harlow Gallery in Hallowell, MaineTRANSCRIPT
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Introduction to Pinhole Photography
For World Pinhole Photography Day
Sunday, April 28, 2013
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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.
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The camera obscura worked by light entering through a small pinhole
which hits the wall inside, forming a faint image which can be traced.
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When the image is projected,, it appears upside down.
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Arab Physicist, Alhazen discovered that the smaller the pin
hole the sharper the image came into focus.
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Daniello Barbaro discovered that replacing the pinhole with
a glass lens gave the image a brighter and sharper focus.
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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.
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Camera obscura, from a manuscript of military designs.
17th century, possibly Italian.
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Later versions were long wooden boxes that projected an
image onto a piece of frosted glass built into the lid.
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4 drawings by Canaletto, representing Campo San Giovanni e Paolo in
Venice, obtained with a Camera obscura.
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"View from the Window at Le Gras" (circa 1826Joseph Nicéphore Niépce. He called this process "heliography" or sun drawing the
exposure time was about 8 hours.
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Louis Jacques Mande DAGUERRE (1787-1851)
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Sir David Brewster (11 December 1781 – 10 February 1868)
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Brewster Stereoscope
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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
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Eric Renner
Grandma Becomes the Moonpinhole photograph, 1978
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• According to Renner (1995: 117)• most formulas used today are of
the following general form:• r = pinhole radius
l = wavelength of lightc = a constant, usually a decimal fraction
• between 0.5 and 1f = focal length
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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.
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developer made of:
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Competes with the best developers available
This developer deserves more attention.
Time for a cup of coffee....
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Manfred Bucheit 1979
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Pinhole Blenders
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Rene Smets 360 panorama pinhole
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Rene Smets
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Jefrey Pelagio Jacob
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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.
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Diane Martin PetersonWarped..pinhole on paper..rounded tin gives the warped appearance...
5 minutes in caffenol
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Polaroid Pinhole Image
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Solargraphy
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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