The Laowa 4mm f/2.8 fisheye lens with 210° FoV from Venus Optics is delayed. The lens was supposed to be released this Friday. New release date was not provided.
Update: it seems that this delay was only for the Japanese distributor of Laowa lenses.
Here is the new Laowa 4mm f/2.8 fisheye lens in action (additional information available here):
Via Dpreview