Both STELLA telescopes were manufactured by Halfmann Teleskoptechnik in Neusäß near Augsburg, Germany, which has been part of Halfmann Maschinenbau GmbH. They no longer build telescopes.They feature an Alt/Az mount and an aperture of 1.2m. The first telescope (STELLA-I) is an f/8 system with two Nasmyth foci and a field of view of 30'. The telescopes are equipped with a hydrostatic azimuthal bearing driven by a single stage oil pump, the altitude axis features a ball bearing. The two telescope axes are moved by direct-drive motors from ETEL with optical Heidenhain encoders. One increment on the encoder corresponds to 36", which is interpolated at a resolution of 11 bits, which translates to a theoretical pointing and tracking accuracy of the drives of 0.18''. This samples well the average site seeing of about 1''.