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.
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. I save a lot of money buying it on Amazon and no other like products came close to it in price. Can't complain about it's performance. Meets my need for wide angle shots.
GREAT all-purpose lens! More bang for the buck than the big brand names!
18 February 2012
Summary: I did a portrait session last night, and had a chance to compare several Nikon lenses with my newest addition to my bag, the Sigma 18-50 mm. It's quickly becoming my favorite lens! It auto-focuses very fast, and the pictures are sharp. This is my third Sigma lens, and I'm very impressed with the quality and the value.
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. Now, bear in mind that I'm not a professional photographer.
Summary: I tried this lens on my Canon 7D; it focuses very sharp in manual focus. But when I tried it with auto focusing, it was not that sharp, it was almost there but not quiet there. If you are okay with manual focusing all the time I guess this is a great lens. My experience with Sigma lens is kind of mixed.I love my Sigma 10-20 and 170 -500, but had to return two of the 2.8/f lenses.