Cosina just published this video with the info about a new Voigtlander 75mm f/1.8 FE lens with built-in BOKEH control ring.
If you rotate it you can create different kind of Bokeh effects:
Curiosity: At the beginning of the video Cosina introduced the new Zeiss lenses with whom they have a partnership. I suspect the OTUS lenses are produced by Cosina ;)
–
Thanks Greg Painter for spotting this!