The Very Large Telescope (VLT) is operated by the European Southern Observatory (ESO) on Cerro Paranal in the Atacama Desert of northern Chile. The VLT consists of four individual telescopes,

Together with ESO, the W. M. Keck Observatory was involved in the development of the SodiumStar 20/2, providing additional specifications. Thus, in parallel to the deliveries to ESO, already in