Today zeiss announced the 25mm f/1.4 lens for Canon/Nikon mount only. But it can be used with adapter on any Sony E-mount camera. And this is amanual focusing lens only so you are not going to loose any benefit doing so anyway. This is the fastest wide angle lens from Zeiss. And it costs $2,399 at BHphoto. and 2399 Euro at Photo Porst Neuwied.
More info at Zeiss.com.