Zeiss has officially announced the previous rumored Ventum 2.8/21 E-mount lens for drones. This lens is a lightweight industrial lens, EU price 1,500, available now.
Zeiss Ventum 21mm f/2.8 Lens
Update: Zeiss Ventum 21mm f/2.8 Lens Leaked Image for Drone & Surveillance Cameras
Zeiss seems to release a new Ventum series of lenses for Drone & Surveillance Cameras. The first leaked image of Zeiss Ventum 21mm f/2.8 lens now already leaked online.