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A very good lens gets an update
Tamron has announced a revised version of its popular 17-50mm F2.8 fast standard zoom for APS-C/DX SLRs, which now incorporates optical image stabilization (or as the company calls it, Vibration Compensation). The SP AF 17-50mm F/2.8 XR Di II VC LD Aspherical [IF] offers a useful wide angle to short telephoto range of 26-78mm (35mm equivalent) in a compact design scarcely larger than its unstabilized predecessor. The 19 element / 14 group optical design employs a host of special elements to minimize aberrations, and features a minimum focusing distance of 0.29m over the entire zoom range, with a maximum magnification of 0.21x. It will be available in Nikon mount (with a built-in focusing motor) from mid-September, with a Canon version to follow.