- 57 Diax IIb,
has interchangeable lenses, and is a
rangefinder camera that is similar to the IIa but with a rapid wind
lever and cosmetic changes to the top plate of the camera body. This
version sports the fast and more desireable Schneider - Kreuznach Xenon
f2 / 50mm lens in a Synchro - Compur shutter. Also, a Schneider -
Kreuznach Tele-Xenar f4 / 135mm is shown with this example.
The lenses for the a and b series cameras are intechangeable but turned