For those who expect extraordinary photographic performance look for the Tamron SP lens.
The SP designates it was delivered by engineers who are free to innovate in an uncommon atmosphere where optical performance comes before price.The Tamron SP 17-50mm F/2.8 Di-II VC gives you wide-to-moderate-telephoto zoom characteristics rendering a picture angle range approximating a 26-78mm lens on a full frame DSLR or a 35mm SLR. The fast and constant f/2.8 maximum aperture provides extra depth-of-field flexibility and you will quickly notice additional freedom in lowlight conditions and increased viewfinder brightness.
State-of-the art properties include XR (Extra Refractive Index) and LD (Low Dispersion) glass in an optical formula employing 19 elements and 14 groups—optimized for performance and handling by the use of aspherical element design and internal focus.
Tamron's proprietary tri-axial VC (Vibration Compensation) image stabilization adds to image sharpness and further expands low-light shooting freedom by many as four shutter speeds slower than would otherwise be possible.
The Tamron SP 17-50MM F/2.8 Di II XR VC LD Aspherical (IF)ready for your Nikon or Canon$50.00 Rebate thru April 30, 2011
|Above:Example shots||taken with the lens.|
|Below: Example showing VC off.||Below: Example showing VC on.|