As an SP Di II class lens optimized for exclusive use on digital SLR cameras with APS-C size image sensors, this lens employs an advanced optical design that delivers fine, high-definition digital images, with high resolution, high contrast, and excellent image recording accuracy over the entire imaging field. Special glass has been used for multiple lens elements to correct the various aberrations that would otherwise diminish imaging performance. The result is a lens that captures extraordinary detail and contrast, but is impressively compact in size. Ghosting and flare have been reduced to a minimum with the use of special coatings on all cemented optical surfaces, resulting in sharp lifelike images with excellent color fidelity. The SP AF17-50mm F/2.8 XR Di II VC represents the crowning achievement of Tamron's optical design capabilities and technological knowhow. This gem of photographic technology will not only awaken your photographic creativity but also allow you to express it at the highest level.
 

This lens inherits the superb optical performance of the world-renowned high-speed standard zoom, the Tamron SP AF17-50mm F/2.8 XR Di II, acclaimed for its wide maximum aperture of F/2.8 at all focal lengths, and adds the benefits of Tamron's unique proprietary Vibration Compensation (VC) system that delivers critically sharp shake-free handheld images over an extended shooting range. This new fast standard zoom, designed exclusively for use on digital SLR cameras with APS-C size sensors, represents a new stage in the evolution of Tamron lenses. By employing cutting-edge optical technology and state-of-the-art production engineering, Tamron was able to combine the practical shooting advantages, superior definition, and impressively stable viewfinder images provided by VC (Vibration Compensation) system with the outstanding brightness, sharpness, and depth-of-field control possible with a high-speed F/2.8 maximum aperture, and to build a remarkably compact, easy to use lens that allows photographers to express the full range of their creative potential.