Sigma 18-50mm F2.8 DC DN | C review - a fine fast zoom for APS-C - Amateur Photographer
Tamron 17-50mm f/2.8 XR Di II LD Lens for Canon Digital
Amazon.com : Tamron AF 17-50mm F/2.8 XR Di-II LD SP Aspherical (IF) Zoom Lens for Konica Minolta and Sony Digital SLR Cameras (Model A16M) : Camera Lenses : Electronics
Sigma 18-50mm vs. Sony 16-55mm vs. Tamron 17-70mm vs. Sony 16-70mm Vergleich