Cameras

Photographic cameras were a development of the camera obscura
which uses a Pinhole or lens to project an image of the scene outside upside-down onto a viewing surface.

Before the invention of photographic processes there was no way to preserve the images produced by these cameras apart from manually tracing them. The earliest cameras were room-sized, with space for one or more people inside; these gradually evolved into more and more compact models.

Silver chloride coated paper

The first partially successful photograph of a camera image was made in approximately 1816 using a very small camera of his own making and a piece of paper coated with Silver chloride, which darkened where it was exposed to light. No means of removing the remaining unaffected silver chloride, so the photograph was not permanent.

Kodak and birth of film

The use of photographic film was pioneered by George Eastman, who started manufacturing paper film in 1885 before switching to celluloid in 1889. His first camera, which he called the "Kodak," was first offered for sale in 1888. It was a very simplebox camera with a fixed-focus lens and single shutter speed.

Nowadays we use autofocus and DSLR cameras as we all know