The SPACEMASTER space flight planetarium, first introduced by ZEISS in Jena in 1967, was designed for medium sized domes from 12.5 m to 17.5 m in diameter. The planetarium projectors of this series closed the gap between the Jena small size planetariums (ZKP 1) and the large planetariums for dome diameters of more than 18 m. The characteristic dumbbell shape might suggest that it was just a copy of the large planetarium scaled down by half. However, it was a completely new construction which included automation for the first time. The Space Flight Planetarium was the first planetarium projector in the world to introduce the possibility of standard automated programs. Positions and motions of the Sun, Moon, planets, the starry sky, comets, artificial satellites, shooting stars, numerous didactic projections, panoramas and extraterrestrial viewpoints followed the control commands of a punched tape. Space flight planetariums were made in series in the 1970s and 1980s. This photo gives an insight into the Jena assembly hall with four projectors in varying stages of production. The projectors of the first series were installed in planetariums in Brazil and some are still in operation today.