17th century 18th century

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