Advancements in technology

Flash powder in its various forms was popular as a source of artificial light, but as electricity became readily available use was made of any new invention (vacuum tungsten lamp) giving a more controllable, safer, continuous source of light. Coupled with advances in lens and emulsion technology shorter exposure times were achieved. The availability of this controlled continuous light source made the use of photography in portraiture commonplace. Photography in commercial advertising took longer. The first use of photography appearing in newsprint using the newly invented halftone process was in the New York Daily Graphic in the 1880s. The first magazine entirely illustrated by photographs, the Illustrated American, was introduced in 1890. By 1915 most mainstream newspapers were using photography as their major source of illustration. Advances in camera and lens design, the development of film emulsions with faster film speed (its ability to record an image with a short exposure time) and the advent of digital capture, transmission and presentation are part of the continuing evolution of photography.