The Sigma 18-250mm F3.6-6.3 DC Macro OS HSM is one of the best of the current bunch of SLR superzooms, with decent optics, fast autofocus and effective image stabilization. It's a reliable performer, and its close-up capability is handy too.
Photographers looking for a compact, lightweight, all-in-one general purpose and travel lens.;
Anyone unwilling to sacrifice image quality for convenience;