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About Camera
Photograph (wallpapers): photograph (often just called a photo) is an image (or a representation of that on e.g. paper) created by collecting and focusing reflected electromagnetic radiation. The most common photographs are those created of reflected visible wavelengths, producing permanent records of what the human eye can see. Most photographs are made with a camera, which focuses the light onto either photographic film or a CCD or CMOS image sensor. Photographs can also be made by placing objects on photosensitive paper and exposing it to light (the result is often called a photogram) or by placing objects on the platen of a flatbed scanner (see scanner art). Most traditional photographs are produced with a two-step chemical process. In the two-step process, the film holds a negative image (colours and lights/darks are inverted), which is then transferred onto photographic paper as a positive image. Another widely used film is the positive film used for producing transparencies, usually mounted in cardboard or plastic frames called slides. Slides are widely used by professionals mostly due to their sharpness and accuracy of colour rendition. Most photographs published in magazines are still originally taken on colour transparency film. One of the most famous transparency films is Kodachrome. Originally almost all photographs were black and white. Although methods for developing color photos were available as early as the late 19th century, they did not become widely available until the 1940s or 50s, and even in until the 1960s most photographs were taken in black and white. Since then, colour photography has dominated popular photography, although the black and white format remains popular for amateur photographers and artists. Black and white film is considerably easier to develop than colour....