Rollei was a German manufacturer of optical goos founded in 1920 by Paul Franke and Reinhold Heidecke in Braunschweig, Lower Saxony, and maker of the Rolleiflex and Rolleicord series of cameras. After being bought in 1995 by Samsung Techwin, part of the South Korean Samsung Group, it was sold back to its internal management in 1999 . In 2002 it was bought by a Danish investment group, and in 2005 was split into two different companies: "Rollei GmbH" in Berlin, owner of the Rollei brand and selling various OEM equipments, and "Franke & Heidecke GmbH, Feinmechanik und Optik" in Brunswick, and equipment factory . Rollei's cameras typically use Carl Zeiss or Schneider Kreuznach lenses, as well as lenses manufactured by Rollei based on designs by Zeiss, and occasionally lenses made by Japanese manufacturers.