The acclaimed Tamron 18-270mm VC ultra zoom for APS-C architecture DSLRs has accomplished an amazing fresh akin of compactness, performance, and acceleration with the accession of PZD (Piezo Drive), an avant-garde accelerated autofocus motor based on an avant-garde piezoelectric design. The aftereffect is a lens that's appreciably lighter, and acutely beneath and slimmer (filter diameter: 62mm) than any antecedent lens in its class, and provides faster, quieter auto-focusing.Signature features that have made this amazingly versatile lens the world standard in its class have been retained. They include a 28-419mm equivalent (15X) zoom range, an improved, lightweight, compact Vibration Compensation (VC) system, macro focusing to 0.49m (19.3 inches) throughout, and, of course, superlative imaging performance.
For SLR camera high-zoom-ratio lenses with 15x magnification capability. Current as of December 2010. (Source: Tamron).