Iím going to have to go against the grain here. This lens is soft. The auto focus speed is very slow. Even at the sharpest apertures of f5.6 at 24-70 and f8 at 70-135. Pictures had a funny old style TV (red, green, yellow) pattern when blown up. I got this used from eBay for $200usd, 5 months ago. I honestly didnít have a problem with it, till I got an 18-70mm Nikon lens. There was no comparison in sharpness at any aperture. This started to bug me, as I would take important shots only to find that softness around detailed areas of the photo. Good for people coming from point and shoot cameras? Yes. The only reason I kept this lens was for its macro feature. When you photograph small products for sale on eBay under good light, this thing kills the Nikon 18-70mm lens. But it was destine not to be. I sold this on eBay again for a $40.00 loss. If you want sharp photos, do not get this lens. Last but not least, the lens sucks in dust like a vacuum cleaner.
I will end this on a positive note about the lens. All metal body build with rubber grips. Itís built very well. I find it funny that my Nikon glass is made so poorly and yet sharper.