This lens was announced a year ago, but never materialized. The older version is no longer available either. I rented the earlier version (not the oldest one) late last year. It was a great lens. It didn't have stabilization, but the nice, wide aperture allowed me to shoot most things shake free. This was a very nice lens, and from what I could tell had very good IQ. I was eagerly waiting for the updated version, but I think maybe Sigma has killed the project. Maybe too much overlap with the 70-200 f/2.8? This lens was nice and light, small, and built really well. It was really just a nice lens. Too bad. Maybe I can buy this lens from my local rental place.