Schmidt camera
Bernhard Schmidt, inventor of the Schmidt camera worked at the Observatory including making telescopes, instruments, and observations starting in 1916. Walter Baade successfully petitioned the Hamburg senate to have Schmidt camera installed in 1937, and it was completed in 1954 after work restarted on in 1951 after being interrupted by WWII. Walter Baade also succeeded in having a Schmidt camera built at Palomar Observatory in California.