The Zeiss Kleinplanetarium (ZKP) was built from 1952 to about 1980 in Jena. It was the only projector for small plantariums for many years, and it turned out a surprisingly robust instrument that is still in use in many facilities around the World. Its design most resembles the first Model-I projector, for the complete sky of the Northern and Southern hemisphere is stored on a single ball. It has 32 lenses, each of which maps approximately 150 stars, so, almost 5000 stars can be shown. Futhermore, it has additional projectors for the Milky Way, the planets and the moon. The handling is purely hand operated, thus, the presenter has to operate it from the center of the dome.