History of photography & Camera

We owe the name "Photography" to Sir John Herschel, who first used the term in 1839, the year the photographic process became public. The word is from the Greek words for light and writing. The innovations which would lead to the development of photography existed long before the first photograph. The camera obscura (Latin,literally translating to "dark room") had been in existence for at least four hundred years, but its use was limited to its purpose as an aid to drawing. It was discovered that if a room was completely darkened, with a single hole in one wall, an inverted image would be seen on the opposite wall. A person inside of the room could then trace this image, which was upside-down (similating the way that images actually enter our eyes). The earliest record of the uses of a camera obscura can be found in the writings of Leonardo da Vinci (1452-1519), who may have used it as an aid to understanding perspective. In the 17th and 18th centuries, a table-top model was developed. By adding a focused lens and a mirror, it was possible for a person outside of the box to trace the image which was reflected through it.