Zeiss Ikon is a German company that was formed in 1926 by the merger of four camera makers (Contessa-Nettel, Ernemann, Goerz and Ica), and an infusion of capital by Zeiss. The company formed one part of the Carl Zeiss Foundation, another part being the optical company Carl Zeiss. Logically, most of the Zeiss Ikon cameras were equipped with Carl Zeiss lenses and the formerly independent companies, in particular Goerz, had to shut down their own lens manufacture. The merged company was also obliged to use Compur shutters for 80% of its cameras. Thus only the simplest cameras could get cheaper shutters like the Klio. Soon AG Hahn für Optik und Mechanik, Kassel, and Goerz Photochemisches Werk GmbH, Berlin, joined the Zeiss Ikon syndicate. The group became one of the big companies in the phototechnical capital Dresden, with plants in Stuttgart and Berlin. Until WWII Zeiss Ikon was the world's market leading maker of 8mm movie cameras.