Irene

On August 19, 1839 was announced in Paris that Louis Daguerre had discovered a process of "fixing the image of the dark camera by the action of light itself." He had developed a suitablephotosensitive material capable of recording a direct image.
The camera is a device to stop time. The realism of photography can lead to earlier times and make us live historical dates. If more, until 1839 allvisual documents were drawings, prints or paintings.
The situation changed in the 70 to 80 cameras with the introduction of small, manageable and sensitive materials that allowed the taking of snapshotsin most situations.

From certain discoveries, there were many who tried or "able" to take pictures, but it was Joseph Nicephore in 1827 (ONE TOUSAN, EIGTH HUNDRED AND TWENTY SEVEN), who obtainedthe first photograph found in history.
Besides these there were many subsequent discoveries were completed in the current cameras, mechanical, automatic, fast, very precise, with color photos.

35 mmcompact cameras: These are the most used by professional people do not

SLR Cameras SLR: In this case, the image seen by the photographer is the same that will be captured

Digital Cameras: It is usedto capture photographs electronically instead of using photographic film as the first cameras. Usually these are the most widely used lately.
 
Cameras in phones:
Today there is a new possibility:digital camera phones. With the passage of time have become increasingly better quality. In these days, the majority of present cellular camera, some of better quality than others.
 

Component parts...
Objective: Set of lenses that focus light rays. Piece of polished glass.
 
Shutter: A mechanical device, to decide on the exact moment that the picture will be and how long it will be exposed tolight.
 

Diaphragm: A disc that controls the amount of light reaching the film. It is near the goal. We can vary the light entering the camera.
 

Viewfinder: Through this we can see ahead and focus...