Yes, now I can shoot UV with a fisheye !! Even hand-held, thanks to the monochrome NEX-5N given to me by Vivek Iyer (the nice guy we ran into during the NG Photo Race in The Hague, last November). The lens is a SUNEX 5.6mm f/5.6 and a Baader U was used for filtering out anything other than UV.
This was just a quick and dirty shot at f/5.6, 1/40 sec, ISO 200, nothing of particular importance, except for a proof of concept. Under heavy overcast winter skies that tells a lot of the system sensitivity to UV. Good news for me for the upcoming trip to visit Andrea in New Mexico!