Mechanically this camera is smooth and easy to crank and the fader
device works like new. With the push of a button on the top of the
camera the fader, which is attached to the lens, will move the iris
mechanically to either a higher F-stop or a lower F-stop at your choosing.
"In camera" fades to white or fades to black are done with
this mechanism. The lens is an original Carl Zeiss Jena Nr 778147
Tessar 1:2.7 F=4cm.