Above:The original 75mm with an ekstra lens and extension ring make it a tele.
This camera has plate back adapter with ground glass
for using plates or sheet film.
For photos on roll film it is necessary to use a ring
that places the lens a little bit longer from the body.
This ring should have the same serial number as the body.
When using the extra front lens together with an extension ring
it works as a telelens.
It also has a wide lens 55mm. See photos.
This camera is much more rare than the model A and B.
Linse:Carl Zeiss Jena Tessar 75mm 1:2.8