The Kaiser diascop 50 N 2015 can be slides and film negatives good and clear betrachten.Leider is to insert the filmstrip difficult because these are arched and the end first introduced can not find the exit slot. So how to load filmstrip virtually impossible or an ordeal.
Remedy creates one by a homemade Aids a cardboard bzw- plastic strip which is easy kinked, which you can fix the film. The aid must be thin enough to fit through the two slots (Input + output).
I would have expected that such aid delivery would by lying.