Fast 21mm lenses for your A7 and A7r

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With the A7 and A7r Full Frame mirrorless will become affordable (compared to the expensive Leica M cameras). But the A7 and A7r only come with two FE primes (Zeiss 35mm 2.8 and 55mm 1.8 lenses). This means we have to look elsewhere to get some prime lenses. I thought it would be good to make a quick roundup of lenses we could use via adapter on our A7/A7r cameras. I will start with 21mm lens primes. Here is a short list of lenses you could use on the Sony (fastest lens on top):

[shoplink 21603 ebay]Leica Summilux-M 21mm f/1.4 (here on eBay)[/shoplink].
[shoplink 21602 ebay]Voigtländer Ultron 21mm f/1,8 (here on eBay)[/shoplink].
[shoplink 21598 ebay]Olympus OM 21mm f/2.0 (here on eBay)[/shoplink].
[shoplink 21604 ebay]Miolta MD/MC 21mm f/2.8 (here on eBay)[/shoplink].
[shoplink 21600 ebay]Zeiss ZM 21mm f/2.8 (here on eBay)[/shoplink].
[shoplink 21599 ebay]Olympus OM 21mm f/3.5 (here on eBay)[/shoplink].
[shoplink 21624 ebay]Leica Tri-Elmar 21mm f/4.0 (here on eBay)[/shoplink].
[shoplink 21607 ebay]Voigtländer Color-Skopar 21mm f/4.0 (here on eBay)[/shoplink].
[shoplink 21605 ebay]Konica Hexanon AR 21mm f/4.0 (here on eBay)[/shoplink].
[shoplink 21601 ebay]Zeiss ZM 21mm f/4.5 (here on eBay)[/shoplink].

It has yet to be seen how good (or bad) these lenses do perform on the Sony A7 series. The only test I found on the VG900 is with the expensive Leica Super-Elmar-M 21mm ASPH @ VG-900.
http://www.flickr.com/photos/dakw23/8686006909/in/photostream/
http://www.flickr.com/photos/dakw23/8686006001/in/photostream/
http://www.flickr.com/photos/dakw23/8180002855/in/photostream/

If some of our SAR readers tested one of the mentioned lenses on the VG900 please comment this post! Thanks!

P.S.: Next series is for the 24mm lenses (send me your VG900 tests at sonyalpharumors@gmail.com).