Ok we all know how lovely, fun and addictive legacy glass is. Now, let's say I want a reasonably size fast zoom for my NEX... There's none. Ok, so what if I want to adapt say, a Tamron or Sigma 17-50/2.8 (or close anyway), how do I do that ? What about aperture selection on modern lenses with no aperture ring ?? What about EF or Nikon F or G, or Minolta lenses or Pentax current lenses ? I know there are two adapters for the Minolta/Sony lenses but what about the other mounts ? I have a cute fastish Sigma zoom in EF mount which AF is broken, but I'd still like to try if on my NEX, how do I go about it ???