Since its inception, the physical support of cinema has changed a lot. The development of various technologies gradually allowed the use of new and better materials for filming. Simultaneously in projections require more specialized image proportions. The film format par excellence, 35mm, was invented by Thomas Alva Edison on a cellulose support. The 16mm, 9.5mm or Super 8 were later added to it. In 1920, the widescreen format was spread.