This old Carl Zeiss f4.5 250mm lens belonged to my father, who said that this was used for some kind of wooden electrostatic-photocopy machine from a document-copying shop that he used to run.
Please help me identify what mount this lens has. The only information that I could find on the net remotely similar to this was in Russian.
Was this made for some kind of large format view camera? Can this be adapted for a Canon or a Nikon DSLR? It has some kind of a screw mount.