The Tamron 18-400mm f/3.5-6.3 Di II VC HLD covers an incredible zoom range, from wide angle to super telephoto, and while it doesn't match lenses with shorter ratios in image quality, it betters them in convenience.
22.2x zoom ratio; Solid image quality; Image stabilization; Moisture-resistant design; 1:2.9 macro magnification; Available for Nikon and Canon SLRs
Wide-open performance suffers beyond 300mm; Shows some chromatic aberration at longer focal lengths; Visible distortion; Focus ring rotates during AF