The need for EXTREME speed: Rodenstock 50mm f/0.75 in m43 mount!

The eBay reseller “jieying-usa” is reworking lenses so that they can fit on Micro Four Thirds cameras without the need of any adapter! And the Rodenstock 50mm f/0.75 is one of those lenses with m43 mount (Click here to check the acution on eBay). The lens focuses from 3ft to infinity. Wide open, images are very soft but unlike C-mount lenses the circle covers the full m43 size. You can see a few image samples on Flickr. The same reseller also makes the Kowa 55mm f/1.0 with m43 mount.

P.S.: A question to our readers. How many stops difference do you have between f/.075 and the f/0.95 from the Voigtländer?