brief history of photography

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A Brief History Of Photography
Contributed by Scott Michaels
Thursday, 28 June 2007




By: Scott Michaels

For centuries images have been projected onto surfaces. The camera obscura and the camera lucida were used by
artists to trace scenes as early as the 16th century. These early cameras did not fix an image in time; they only projected
what passed through an opening in the wall of a darkened room onto a surface. In effect, the entire room was turned into
a large pinhole camera. Indeed, the phrase camera obscura literally means "darkened room," and it is after these
darkened rooms that all modern cameras have been named.
The first photograph is considered to be an image produced in 1826 by the French inventor Nicéphore Niépce on a
polished pewter plate covered with a petroleum derivative called bitumen of Judea. It was produced with a camera, and
required an eight hour exposure in bright sunshine. However this process turned out to be a dead end and Niépce
began experimenting with silver compounds based on a Johann Heinrich Schultz discovery in 1724 that a silver and
chalk mixture darkens when exposed to light.

Niépce, in Chalon-sur-Saône, and the artist Louis Daguerre, in Paris, refined the existing silver process in a partnership.
In 1833 Niépce died of a stroke, leaving his notes to Daguerre. While he had no scientific background, Daguerre made
two pivotal contributions to the process.

He discovered that by exposing the silver first to iodine vapour, before exposure to light, and then to mercury fumes after
the photograph was taken, a latent image could be formed and made visible. By then bathing the plate in a salt bath the
image could be fixed.

In 1839 Daguerre announced that he had invented a process using silver on a copper plate called the Daguerreotype. A
similar process is still used today for Polaroids. The French government bought the patent and immediately made it
public domain.

Across the English Channel, William Fox Talbot had earlier discovered another means to fix a silver process image but
had kept it secret. After reading about Daguerre's invention Talbot refined his process, so that it might be fast enough to
take photographs of people as Daguerre had done and by 1840 he had invented the calotype process.

He coated paper sheets with silver chloride to create an intermediate negative image. Unlike a daguerreotype a calotype
negative could be used to reproduce positive prints, like most chemical films do today. Talbot patented this process
which greatly limited its adoption.

He spent the rest of his life in lawsuits defending the patent until he gave up on document.write(" photography");
photography altogether. But later this process was refined by George Eastman and is today the basic technology used
by chemical film cameras. Hippolyte Bayard also developed a method of document.write(" photography"); photography
but delayed announcing it, and so was not recognized as its inventor.

In the darkroomIn 1851 Frederick Scott Archer invented the collodion process. It was the process used by Lewis Carroll.

Slovene Janez Puhar invented the technical procedure for making photographs on glass in 1841. The invention was
recognized on July 17th 1852 in Paris by the Académie Nationale Agricole, Manufacturière et Commerciale.

The Daguerreotype proved popular in responding to the demand for portraiture emerging from the middle classes during
the Industrial Revolution. This demand, that could not be met in volume and in cost by oil painting, may well have been
the push for the development of photography.

However daguerreotypes, while beautiful, were fragile and difficult to copy. A single photograph taken in a portrait studio
could cost US$1000 in 2006 dollars. Photographers also encouraged chemists to refine the process of making many
copies cheaply, which eventually led them back to Talbot's process. Ultimately, the modern photographic process came
about from a series of refinements and improvements in the first 20 years.

In 1884 George Eastman, of Rochester, New York, developed dry gel on paper, or film, to replace the photographic plate
so that a photographer no longer needed to carry boxes of plates and toxic chemicals around. In July of 1888 Eastman's
Kodak camera went on the market with the slogan "You press the button, we do the rest". Now anyone could take a
photograph and leave the complex parts of the process to others. document.write(" Photography"); Photography
became available for the mass-market in 1901 with the introduction of Kodak Brownie.

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Since then color film has become standard, as well as automatic focus and automatic exposure. Digital recording of
images is becoming increasingly common, as digital cameras allow instant previews on LCD screens and the resolution
of top of the range models has exceeded high quality 35mm film while lower resolution models have become affordable.
For the enthusiast photographer processing black and white film, little has changed since the introduction of the 35mm
film Leica camera in 1925.Antique photos are a vital part of any family heirloom.




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