Schmidt originally introduced it as part of a wide-field photographic catadioptric telescope, the Schmidt camera. Walter Baade also succeeded in having a Schmidt camera built at Palomar Observatory in California. Schorr urged Schmidt to build the first Schmidt Camera at Bergedorf observatory. Schmidt camera was installed in the West Dome in 1951. Like the Schmidt camera, the Maksutov camera has a curved focal plane. In 1972, a 28-inch Schmidt camera replaced the 21-inch reflector. Schmidt camera at Palomar Mountain in California. Starting in the early 1970s, Celestron marketed an 8-inch Schmidt camera. Members constructed a Schmidt camera for the 1937 Brown eclipse expedition. The Schmidt camera was invented by German-Estonian optician Bernhard Schmidt in 1930. A 7-inch (18 cm) diameter aperture Schmidt camera was also at Yerkes Observatory. The UKST is a Schmidt camera, with a design based on the Oschin Schmidt Telescope. The telescope used in the Lowell Observatory Near-Earth-Object Search (LONEOS) is also a Schmidt camera.