I am with The Lotus Eater. When I saw this announcement I immediately thought of buying this lens for my Sony NEX system and fitting to my Converter LA-EA2 to get Vibration Reduction. Then I read this in lens function was disabled on Sony and Pentax models so the idea was dropped as fast as it occurred. I went through the same thought process when I read about the recent Tamron upgraded 18-270mm model. Shame on both Tamron and Sigma.Surely, here was an opportunity to market this lens to NEX users who also have a Sony DSLR such as myself. Presumably Tamron thinks that NEX users will be happy with their E-mount 18-200 but Sigma have no such offering - at least not yet.