17th century 18th century 1826183918701888190019702010

17th century

18th century

1826 1839 1870 1888 1900 1970 2010

Photography

•Photography envolved from the combination of optics and chemistry.

17th Century•If light is passed trough

small hole made in the wall of a dark room, an image of the outside scene is made on the wall.

•Portable camera obscurae with lenses were used to give clear images

Camera obscura

18th century• Scientists found out that some chemicals (silver salts) turned darker when exposed to sunlight.

1826• French inventor, Nicéphore Niépce cevered a sheet of metal with tar, put in a box with a lens and pointed it out the window. Eight ours later, he had a permanent photograph.

By 1839• Louis Daguerre’s was takin pictures in 15 minutes. But only one photo (a glass plate daguerreotype) could be taken at a time.

At the same time• William Fox Talbot began

experimenting with paper.He soon descovered a way of taking negatives. From a negative, unlimited copies could be made of the picture.

Negative

By the 1870s• The chemicals used were more efficient and less messy. Exposure times were reduced to less than a second so cameras could be held in the hand for the first time.

1888• A small camera, the Kodak, was invented by American George Eastman.The film was on a celluloid roll. For the first time you did not need to know anything about optics or chemistry to take a picture.

1900• Brownie was invented by Eastman. It cost only 5 shillings.

Pixels• Silicon chips with milions of light sensitive elements called pixels combine to convert light into electronic data.

1970• Digital cameras were first developed for military and astronomy purposes.

First digital camera

Nowadays cameras• Today you can find the

tiniest digital camera ever in your phone, under the water, in the space or used inside your body!

Camera for…

Under the water

In your phone

In the space

Inside your body

The

End