There you have it, officially on Zeiss's page:
http://www.zeiss.com/camera-lenses/en_de/camera_lenses/otus/otus1428.html
I would have preferred a 24mm version :-(
http://www.zeiss.com/camera-lenses/en_de/camera_lenses/otus/otus1428.html
I would have preferred a 24mm version :-(