What you see her eon top is the prototype of a new 21mm f/2.8 Full Frame E-mount lens developed by Zhongyi. That is the company that already makes the following Sony products:
The 50mm f/0.95 FE lens ([shoplink 31838 ebay]here on eBay[/shoplink]).
The 35mm f/0.95 E-mount APS-C lens ([shoplink 31839 ebay]here on eBay[/shoplink]).
The Speedbooster clone, Turbo adapter ([shoplink 31840 ebay]here on eBay[/shoplink]).
A Zhongyi company responsible wrote on Xitek. that this FE21/F2.8 lens is optimized to be used on the A7r. It means that unlike so many other wide angle lenses it has no magenta shift issue. Those are the lens specs:
21mm
f/2.8
manual focus ring
manual aperture ring
72mm filter size
weight is 290 gram
Price is 1900 Yuan (around 300 dollars)
The lens is heavier than similar Konica or Contax lenses because the corner image quality is better (says Zhongyi). Here are some image samples taken with the lens (Click on the image to enlarge)
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Thanks TDTW