Tamron AF 17-50mm 2.8 XR Di II LD ASL digital lens (67mm filter thread) with "Built-in Motor" for Nikon (Accessories)
I had before actually, my standard zoom Nikkor AF-S DX exchange 18-70 f / 3.5-4.5 ED against a light stronger lens. This objective should be according to various test reports (photozone.de, dx0mark.com etc.), as far as the point of focus, very well,