Rollei P66S Plankonvex Linse #3 für 6x6 Diaprojektor Kondensor-Linsen-System
Linse, 5x, plankonvex, Kunststoff, Ø 20mm oder 60 mm
Skiopticon image from the Department of Photography at the Royal Institute of Technology. Use by Professor Helmer Bäckström as lecture material. Bäckström was Sweden's first professor in photography at the Royal Institute