Upload & Sell: Off
I would love see a 50mm F/1.0 from Sigma. Unfortunately AF accuracy most likely wont be reliable.
That would be highly unlikely .
Sigma like the other 3rd party makers have to design a lens to work on all (or at least most) mounts . The different mounts (and register distances) don't really change the basic design.
And then they also will want to make something that is marketable to enough users to be profitable at a competitive price , which is in general why they havnt done anything faster that 1.4