Sigma 18-50mm f/2.8 EX DC SLD ELD Aspherical Macro Lens for Pentax and Samsung Digital SLR Cameras

The Sigma Corporation is pleased to announce the launch of the new 18-50mm F2.8 EX DC MACRO lens. This lens has a large aperture of F2.8 throughout the entire zoom range, a minimum focusing distance of 20cm (7.9..) and a maximum magnification of 1:3, making it ideal for close-up photography. Specially designed to suit the characteristics of digital SLR cameras this lens provides a high level of optical performance. Its design incorporates both glass-mold and hybrid aspherical lens technology which offers extremely high image quality as well as a compact and lightweight construction. Minimal vignetting and superior peripheral brightness is ensured. Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of color aberrations. The super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras. High image quality is assured throughout the entire zoom range. An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood (supplied) plus circular polarizing filters.
Customer Review: Excellent all-around lens
We bought this lens for a wedding occasion and it performed great! The lens is very fast and very sharp. It is a little heavy and unbalances the k100D a little. I guess it would be a better fit for the k10 or k20. We love it and are amazed at the photographic opportunities that a faster lens provides. Spend the money... avoid the pentax version because it is not better optically according to many reviews.
Customer Review: Great Lens for the Price
I was initially thinking about the Pentax 16-50mm, but changed my mind due to the QC problems they are having with it. I did my research and many, many users highly recommend this one. I took the chance and could not be happier. This lens is fast and the IQ is as good or better than most other lenses. Highly recommended.