The Tamron SP AF17-50mm f2.8 XR Di II lens offers digital SLR's (with an APS-C sized image sensor) a focal length equivalent to that of approx. 25.5-75mm on a 35mm camera.
This fast standard wide angle zoom lens features a lightweight, compact form for exclusive use with digital SLR cameras. With a fast F/2.8 maximum aperture throughout the zoom range, this lens is one of the best in its class. This is especially so when it comes to delivering the most crisp detail to the image sensor.
An element of both HID (High Index High Dispersion) and LD (Low Dispersion) glass are used to minimize on-axis and lateral chromatic aberrations. In addition, one high precision, large clear aperture, glass-molded aspherical element and two hybrid aspherical elements are used to compensate for spherical and chromatic aberrations and distortion, to achieve outstanding optical quality.
The Tamron 17-50mm f2.8 lens has an exceptionally high-quality optic system utilising LD, XR, hybrid aspherical, and other kinds of extraordinary elements, as well as special coating technology, to realize the excellent image rendering performance of the SP series.
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