Keywords: Source Four ERS.jpg This photo is an image of a Source Four ERS lighting instrument made by en Electronic Theatre Controls in use The fixture's beam angle is between 19 and 50 degrees depending on the lens For more information see en ellipsoidal reflector spotlight en wikipedia Transfer was stated to be made by User Ddxc 2006-03-22 Driken wikipedia en Driken original upload log page en wikipedia Source_Four_ERS jpg 2006-03-22 22 29 Driken 1200×1600×8 438968 bytes <nowiki></nowiki> Source Four Cinematography Optical filters |