Cerro Tololo Inter-American Observatory
RC Optical Systems produced the Lulin Observatory 0.41-m (16-inch) f/8.8 in Taiwan Six .61 RCOS are being used in the PROMPT telescope (Panchromatic Robotic Optical Monitoring and Polarimetry Telescopes), which is being built by the University of North Carolina at Chapel Hill at Cerro Tololo Inter-American Observatory (CTIO) in Chile.