Sigma Zoom Super Wide Angle AF 17-70mm f2.8-4.5 DC Macro Autofocus Lens for Canon Digital SLR Cameras

The Sigma 17-70mm f/2.8-4.5 DC Macro Lens can be used with wide variety of subjects and it is an ideal large aperture standard zoom lens for digital SLR cameras featuring APS-C size image sensor. This lens has a minimum focusing distance of 7.9" (20cm) throughout the entire zoom range. Maximum magnification of 1:2.3 enables close-up photography like a macro lens. The new lens design and multi layer lens coating reduce flare and ghosting, which is a common problem with digital cameras. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations and produce a high level of optical performance throughout the entire zoom range. This lens offers a large aperture of F2.8 at 17mm wide angle and yet it is compact, with an overall length of 82.5mm (3.2") and diameter 79mm (3.1"). It performs superbly even in relatively low light conditions indoors or at dusk. The lens design incorporates an inner focusing system, which ensures fast AF speed as well as prevents the front of the lens rotating, making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods. This lens is also equipped with Zoom Lock Switch that eliminates «Zoom Creep» during transportation.
Price: $479.95
Customer Review: Was not disappointed
I bought the lens about 2 years ago to replace my Tamron 28-200 that just was not sharp enough. I read techical reviews that compared the Sigma to the comparible Canon lens. They said the Sigma was sharper. I can't verify this but the Sigma is quite a good lens and I've made many of my most successful images with it. This and the Canon 100-400 cover about all my photographic needs. The close focus is awesome. You can almost touch your subject and still get accurate focus. As the title said, I was not dissapointed my purchase.
Customer Review: Great Utility Lens
Great affordable lens with a good focal range - ideal "walkabout" lens. Focus is fast and pictures are sharp. I got this predominantly for underwater photos (put in a dome port to give ability for macro and wider angles with a single lens), but also very useful topside.