This is a modified Kowa 55mm f/1.0 lens. You can use it on your Micro Four Thirds camera without using any adapter. It is currentlz for sale on [shoplink 16724 ebay]eBay (Click here)[/shoplink]. Didn’t find any image smaples taken with that lens :(
A High quality alternative is the [shoplink 14988 ebay]Canon 50mm FD 1.2 (Click here to see current auctions on eBay)[/shoplink]
P.S.: As you might know Kowa announced that they will be making the 350mm f/4, 500mm f/5,6 and 850mm f/9,6 telephoto lenses for Micro Four Thirds.