Cephaloscope 400 mm f4 - Dallmeyer 4a patent

Here a wonderful portrait machine dedicated to 8x10 and even 10x12 plates.

The cephaloscope lens use the same optical design than Dallmeyer 4a. Here glasses are clean, diaphragm works smoothly but soft-focus setting is stuck on tack sharp !

Flange is include (still on my personnal camera)

Ready to shot