Metabones is going to release an adapter that can give a NEX and X-mount camera a full frame fov. It also decreases the F value.
Read more hore
http://www.eoshd.com/content/9467/aps-c-and-super-35mm-just-went-full-frame-metabones-speed-booster
and here
http://www.eoshd.com/content/9474/prototype-metabones-speed-booster-equipped-nex-7-vs-full-frame-5d-mark-iii?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+EOSHD+%28EOSHD.com%29.
Read more hore
http://www.eoshd.com/content/9467/aps-c-and-super-35mm-just-went-full-frame-metabones-speed-booster
and here
http://www.eoshd.com/content/9474/prototype-metabones-speed-booster-equipped-nex-7-vs-full-frame-5d-mark-iii?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+EOSHD+%28EOSHD.com%29.