Like the Daguerreotype, the calotype was a positive print made from a separate paper negative.

Subjects having daguerreotype portraits made were forced to sit still for long exposures and head braces were required to help hold them steady.

An advantage of the Collodian process was that images made with this process could be reproduced

Jacques - Henri Lartigue was responsible for the multiple image motion studies which proved that a galloping horse briefly has all four legs off the ground.

Photography was considered by some to be the the quintessential Surrealist medium.

The purpose of the Farm Security Administration was to convince Congress that the Farmers devastated by the Depression were in need of help from the governments New Deal program.

In 1962 when Time and Life magazines published Larry Burrows color photographs of combat, the public readily accepted them and the demand for more truth in photography increased.

The exhibition of William Egglestons color photographs at the Museum of Modern Art in 1976 helped to get color photography taken seriously and forged the way for the melding of art and photography.

Postmodernism refers to work based on the idea that all art is original.

Appropriation is often associated with postmodernism.