The 18-250mm F3.5-6.3 DC Macro OS HSM from sigma is an incredibly versatile
lens that is a real jack-of-all-trades lens you can carry in any situation.
With a focal length spanning from a wide-angle 18mm up to a 250 mm telephoto
zoom, with macro Cap,abilities to boot, sigma's 18-250mm could easily be your
camera's first all-in-one lens, or a great replacement for several smaller
lenses that you're looking to consolidate.