Officially, it’s called the Tamron SP AF17-50mm F/2.8 XR Di-II VC LD Aspherical (IF), quite a handful for a lens name. This was announced by Tamron a few weeks back and is an update to the previous non–stabilized model. If you recall the older model, it is a good performer for an f/2.8 zoom, especially if you consider it’s price.
Now for approximately a 20% surplus in price, you can now get the same sharp f/2.8 zoom with a Tamron’s “Vibration Compensation” technology, very much like Canon’s “Image Stabilization” and Nikon’s “Vibration Reduction”. With this update, this lens might give Canon’s 17-55 f/2.8 IS a run for its money, and at a much lower price.
The Nikon version of this lens was already shipping a few weeks ago while the Canon version starts shipping this week. I’m looking to get a Canon version, so hopefully I’ll have some sample photos soon. For now, here’s three web–resized samples from Tamron.