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Film Photography

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Mallory Shriver

on 20 March 2011

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Transcript of Film Photography

The camera obscura was invented in the Middle Ages. The very first photograph was take in 1827 by Joseph Nicephore Niece. Niece's photos were called heliographs. They required 8 hours of exposure and dissapeared shortly after they were taken. Louis Daugerre spent 12 years creating a process that only required 30 minutes of exposure and didn't disappear. Daugerre and Niece worked together in 1829. After Niece's death, Daugerre produced an easier method of photography and named it Daugerrotype. Film was finally invented in 1889 by George Eastman. Between 1839 and 1889, huge advancements were made including the invention of the hand-held camera. History. How It Works. The camera lens is a curved piece of glass. It’s role is to absorb beams of light as they bounce off of an object then redirect them into the camera The beams come together to create an image that looks exactly like what is seen through the viewfinder. The glass achieves this by slowing down the light rays. Flatter lens Rounder lens When film is exposed it creates a chemical record of the patterns of light beams. Minuscule light-sensitive grains of chemicals are spread out on a strip of plastic. Light causes a chemical reaction to occur on the film. Color film contains three layers of light-sensitive material (red, green, and blue) in order to produce the colors. Developing the Film. In total darkness, various chemicals and water are poured onto the film. The developer chemicals darken the grains that were exposed in black and white film. Other chemicals fix the image onto the film and prevent the light from exposing it anymore. This produces a negative (some areas of the image are dark and some are lighter and it’s the opposite of what the final image will look like). In color film, the chemicals dye the film. The developed film is placed under a light that projects the image onto photo paper, the enlarger. Photo paper also has light-sensitive chemicals so printing must be done in a darkroom. The paper is placed on a table directly under the film that could be inches or feet above it depending on the size of the image being printed. A timer is set and the enlarger is turned on. Light passes through the film onto the paper causing a chemical reaction. Where the film is dark, less light will pass though leaving a lighter area on the photo paper. A light spot on the film lets more light go though. Photo paper also has light-sensitive chemicals so printing must be done in a darkroom. Where the film is dark, less light will pass through leaving a lighter area on the photo paper. A light spot on the negative lets more light go though so it creates a darker image. Negative Positive The photo paper is placed in a series of chemical and water bathes to develop the image, stop the developing, and to fix the image on the paper so it will be there permanently. Film Photography
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