I picked up info on the new Sigma MC-11 adapter from Sonyalpharumors. Looks as if Sigma and Nikon are still not working together at all. Just pleased that my Commlite adapter is excellent with my Nikon F Sigma 24 1.4 and 35 1.4 Arts on the Sony.
What is quite interesting is that B&H , while not listing the specs, are listing the TCs 1.4 and 2.0 as accessories. If true, the tc 1.4 makes the lens more interesting at that size and weight.
Tom