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
Introduction to Pinhole Photography
For World Pinhole Photography Day
Sunday, April 28, 2013
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.
The camera obscura worked by light entering through a small pinhole
which hits the wall inside, forming a faint image which can be traced.
When the image is projected,, it appears upside down.
Arab Physicist, Alhazen discovered that the smaller the pin
hole the sharper the image came into focus.
Daniello Barbaro discovered that replacing the pinhole with
a glass lens gave the image a brighter and sharper focus.
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.
Camera obscura, from a manuscript of military designs.
17th century, possibly Italian.
Later versions were long wooden boxes that projected an
image onto a piece of frosted glass built into the lid.
4 drawings by Canaletto, representing Campo San Giovanni e Paolo in
Venice, obtained with a Camera obscura.
"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.
Louis Jacques Mande DAGUERRE (1787-1851)
Sir David Brewster (11 December 1781 – 10 February 1868)
Brewster Stereoscope
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
Eric Renner
Grandma Becomes the Moonpinhole photograph, 1978
• 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
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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This developer deserves more attention.
Time for a cup of coffee....
Manfred Bucheit 1979
Pinhole Blenders
Rene Smets 360 panorama pinhole
Rene Smets
Jefrey Pelagio Jacob
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.
Diane Martin PetersonWarped..pinhole on paper..rounded tin gives the warped appearance...
5 minutes in caffenol
Polaroid Pinhole Image
Solargraphy
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