Summary: My brother had bought a used Nikon D200 camera with a Nikor telephoto lens. He wanted something that he could use to take photo's of everything from flowers to family. I highly recommend this Sigma lens, becuase I own several Sigma lens and have always been happy with them.
Summary: not excellent, but not bad;too a simple build zoom for beginners, for prints up to 8x10" some CA's, weak in the corners it must be closed to f8-11 pentax 18-55 is nearly full open much mor sharper, especially in the corners. red fringings wide ope with 18mm
Summary: Great lens, easy to use and perfect for a starter lens. Mounted perfectly and had no issues with the lens. Everything was pretty self explanatory and the wide angle was a vast improvement over the stock lens.
Summary: I really couldn't afford a new lens of this caliber for my Nikon camera. This was used, but when I received it in perfect condition and didn't appear to be used. I have used it a few times and been very satisfied with it.
Summary: While I was using my Nikon D40, this lens was a wonderful improvement over my 50mm prime lens. Friends said that the color of my pictures improved significantly, although I'll swear I didn't notice any difference. The lens is flexible. It's a price performer.
Summary: I read all the reviews and thought it was a great lens considering the low price. However, my experience with this lens has been extremely disappointing. In fact, after trying to get better pictures, I tried over a period of several months to take corrective action.
Summary: I needed a small, lightweight, robust lens with some wide angle capacity for daylight outdoor photography with my Nikon D5000. I chose between the Sigma and the Nikon 18-55 kit lens. The Nikon got good reviews on the optics, but the Sigma appeared more robust and still more compact.