Final answer:
George Eastman invented the dry gelatin roll film and portable cameras such as the Kodak Brownie, making photography more accessible and leading to the 35-mm standard. These innovations were crucial in the transition from still photography to cinema.
Step-by-step explanation:
In 1888, George Eastman revolutionized photography by developing the dry gelatin roll film, which significantly simplified the process of recording images. By producing the first small, inexpensive cameras, such as the Kodak Brownie, he made photography widely accessible to the general public. Prior to Eastman's invention, photographers had to carry cumbersome plates and chemicals, but with the advent of roll film and portable cameras, photography experienced an immense expansion, laying the groundwork for the eventual standardization of 35-mm film.
Eastman's contribution to photography cannot be understated. His Kodak camera, launched with the slogan "You press the button, we do the rest," allowed anyone to capture moments without worrying about the complexities of photo development. The Kodak Brownie, introduced in 1901, further democratized photography by offering a more affordable option to the masses, thereby cementing the camera as an essential tool for personal and artistic expression.
These historical developments in photography paved the way for the motion-picture camera and eventually the film industry, with further advancements continuing into the twentieth century with the creation of color film like Kodak's Kodachrome and Agfa's Agfacolor Neu. Thus, Eastman's innovations were pivotal in the evolution from still photography to the dynamic world of cinema.