Tamron SP AF 17-50mm f/2.8 XR Di II VC review

A standard zoom for APS-C, this is a direct competitor to Canon's 17-55mm f/2.8 lens...

Effective four-stop stabiliser; f/2.8 constant aperture

Noisy autofocus; Middling sharpness at edges

Tamron SP 17-50mm f/2.8 Di II LD Aspherical [IF] Lens - Nikon F TAA16NIK review

I've owned several copies of this lens. Initially, I used it on a Nikon D40 as a lightweight travel lens. I moved on to a D200, D300, and D7000. It performed best on the D7000. However, I moved to a full frame camera (D700) and sold my last copy.

Sharpness; weight

Focusing speed isn't extremely fast; but it hasn't been a problem.