Tamron 18-270 mm f/3.5-6.3 DiII VC LD
It justifies its long name by squeezing more focal lengths than ever before into an interchangeable lens for still photography. Starting at a true wide-angle 27mm (35mm equivalent for Nikon D-SLRs), the digital-only Tamron zooms to a supertele 405mm. Yet its compactness and light weight invite handheld shooting, which is in turn made practical by Tamron's built-in Vibration Compensation (VC) system. VC maintains the 15X zoom's surprising optical quality not only with slower shutter speeds, but also with higher speeds at which shake combined with high magnification can still reduce sharpness. About $630.