Metabones adapter are very good and also expensive. So if you are on budget this test is for you: Pdrphoto posted an interesting Commlite vs Fotodiox adapter autofocus comparison on SonyAlphaForum. What adapter works best on the new Sony A7rII?
eBay links to the adapters:
[shoplink 40921 ebay]Commlite E-mount (Click here)[/shoplink].
[shoplink 40922 ebay]Fotodiox E-mount (Click here)[/shoplink].