Bob Atkins has taken a look at the new Tamron SP AF 17-50mm F2.8 XR Di lens.

“The initial impression of the Tamron SP AF17-50mm F/2.8 XR Di-II LD Aspherical [IF] is that it’s a solid lens. It feels “dense”. Not heavy, but it gives the impression of solidity. The body seems to be made of a composite (plastic) material and the finish is in low-reflectivity black with a gold ring. Both the zoom and manual focus rings are covered in rubber with ribbing to make them easier to grip. The MF/AF switch is located near the lens mount and there is a “lock” button which can be used to lock the zoom at the 17mm position.”

Website: Bob Atkins - Tamron SP AF 17-50mm F2.8 XR Di Lens Review