Principle parts of the Eye

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Principle parts of the Eye
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Principle parts of the Camera
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Camera Obscura
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Joseph Niepce 1826
The Heliograph The first photograph
Helio - sun Graph- picture
8 Hour exposure time
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Louis Jacques Daguerre The Daguerreotype
January, 1839

• Images made with iodine on copper plates
• - Developed in solution of Mercury
• Fixed with salt
• 10-20 minutes exposure

• Good
• Shorter exposure time
• Sharp image

• Bad
• Not reproducible
• Toxic chemicals

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Daguerreotypes
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Daguerreotypes
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Calotype

• Fox Talbot, 1841

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Calotype

• Advantages
• First process to use a negative
• Made the image re-printable
• Shorter Exposure Times
• Prints far cheaper and more durable

• Disadvantages
• Not as sharp as the Daguerreotype

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Calotypes
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Collodion Process

• Frederick Scott Archer, British 1851
• Emulsion made from cotton dissolved in alcohol.
  Made a thick syrup-like gel for coating plates.
• Emulsion was coated with light-sensitive
  Potassiuim Iodide and Silver Nitrate
• Known as the Wet Plate process

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Collodion Wet-Plate

• Advantages
• 2-3 second exposure times
• Used a glass negative
• Very sharp images
• Disadvantages
• Very Difficult, complex process
• Requires use of portable darkroom

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Collodion Wet-Plate
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Collodion Wet-Plate
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Collodion Wet-Plate
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Matthew BradyTimothy OSullivan
Civil War photographers Brady, while often given
credit as photographer of most of the events in
the civil war, was actually the financier who
sent many photographers to document the various
battles. Many of the photos attributed to Brady
are actually By OSullivan
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George Eastman
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George Eastman

• Founder of Eastman-Kodak Company
• Inventor? of roll film.
• Allowed the spread of photography into the public
• The Brownie camera
• For 1, 100 pictures

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Cartes de Visites

• First form of photography adopted by a mass
  audience
• Used as a calling card for visitors, greeting
  cards, etc.

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