Photography

Daguerreotype

This was the first commercially successful photographic process. It was

invented around 1837 by Louis-Jacques-Mandé Daguerre. The process of

taking an image was actually quite complicated. The bottom of a

Daguerreotype camera is like a mirror, this is where the image is made.

The finished plate has to be angled so as to reflect some dark surface in

order to view the image properly. Depending on the angle and colour of

the surface that is being reflected the image can change from a

positive to a negative. Daguerreotypes are lined with velvet to provide

a dark surface that reflects into the plate for viewing.

Image

examplesImage of camera

Polaroid

The Polaroid camera was the first instant camera. This means that

the image would come straight out of the camera onto a piece of shiny

photo paper. The film is a plastic base coated with particles of silver

compound that are sensitive to light.. Black and white film has one

layer of silver andcolour film has three layers; the top layer is

sensitive to blue light, the next layer is sensitive to green and the

bottom layer is sensitive to red light. When you expose the film, the

sensitive grains at each layer react to light of that colour, forming

metallic silver at that layer. This gives you a chemical record of the

light and colour pattern. You then have to develop the film. This is

done by chemicals being exposed to the metallic and forming the

picture. Polaroid photography was invented by Edwin Landin

November, 1948.

Image examples image of camera

Digital

Digital photography focuses and captures images by the lens, the

captured image is then digitzed and stored. The first attempt at

building a digital camera was in 1975 but the actual first digital

camera to capture and store an image was in 1988.

Image examples image of camera