Now that he has his own copies of the new Zeiss Touit lenses, Roger Cicala of Lensrentals decided to crack into the Planar 32mm F1.8 lens. His mission was to see if the renowned build quality of Zeiss optics was compromised to make the lenses more affordable. His teardown detailed the Touit's polymer construction and its use of a DC motor. Click on the link below to go to his blog post.
Removing the filter ring barrel reveals the focusing ring.