Named in honor of Alfred Jensch, internationally renowned for his creative genius in the advancement of the design of astronomical instruments at the Jena Zeiss Works for almost 40 years. The 300-mm and 600-mm Jensch Coelostats are particularly innovative, and he was essentially responsible for the design of the 2 m reflectors at Tautenburg, Shemakha, Ondřejov and Rozhen. The new’ support’ mounting, perhaps his most important innovation, proved to be of enormous value. Jensch has also represented Zeiss Jena on several national and international panels and holds a number of awards. (M 10046) _ _.