The latest version of the Sigma 18-200mm shows a slight drop in image quality, but nothing dramatic on the whole. This stabilized super-zoom is more compact and light-weight than the previous version, and these differences really add to its overall value.
Further readings for the The Sigma 18-200 mm f/3.5-6.3 DC OS HSM II: A new stabilized super-zoom
To provide photographers with a broader perspective about mobiles, lenses and cameras, here are links to articles, reviews, and analyses of photographic equipment produced by DxOMark, renown websites, magazines or blogs.
February 23, 2012
February 10, 2012
June 10, 2011