La Silla - NTT and other telescopes
Some of the telescopes of ESO’s (European Southern Observatory) La Silla Observatory.
Danish 1.54-metre telescope is the one to the leftmost – the other one is not visible in the photo.
The big one in the middle is the NTT (New Technology Telescope) with a 3.58 mirror. This telescope was among the first telescopes to use Active Optics to intentionally and actively shape the main mirror during observations due to the deformation of the mirror under its own weight when used. It lay the path for the later built VLT (Very Large Telescope) further north in the Atacama Desert of Chile.