The new announced Zeiss Distagon Loxia 21mm f/2.8 lens now available for pre-order at B&H Photo Video. The US price is $1,499.00, will be shipping in Mid December, 2015.
Here are some reviews of this new Loxia 2.8/21 lens:
From Diglloyd:
The Loxia 21/2.8 quickly became a favorite in field shooting. It offers very high performance at 21mm in a compact design hardly to be bettered, holding up against the very best 21mm lenses on the market today.
Stevehuffphoto also posted a lot of sample images of this new Zeiss Loxia 2.8/21 lens.