Siding Spring 2.3 m Telescope, Warrumbungle National Park

The 2.3 metre telescope at Siding Spring Observatory is operated by the Australian National University. The Advanced Technology Telescope was constructed during the early 1980s and featured, at the time, radical features: an unusually thin mirror, an alt-az mount and co-rotating dome. The optical telescope has Altazimuth mount and a primary mirror with a focal length of f/2.05. It is housed in a box-shaped building which rotates as the telescope tracks objects. ()