Summary: This lens is very sharp from one end to the other, having taken baby portraits to flying birds and aircraft, it produces great color and it focuses quickly. I was so happy with the Sigma quality that now I have two other Sigma lenses!
Excellent Lens - slightly warm tones - fixable though
Dilip Trivedi "Dilip", Amazon
5 October 2008
Summary: This is a very nice lens - I read several reviews and decided to go for it. The colors are a bit on the warmer side (more red than reality) - but you can fix it either on the camera (by lowering saturation) or on ACDSee (reduce red color). Perhaps a bit on the soft side, but I am learning that DSLR images are great and lend themselves to sharpening with any software without much noise or artifacts.
Summary: I bought this lens hoping it would give me the over all photo lens capability for general photography I want. This lens for the money has come close to that expectation. It is a very good lens. I have shot over 2100 photographs of people and scenes, great clarity for the price. I have no complaints so far.
Summary: I have compared this lens with Nikon's version of the 55-200mm, and I find the auto focus of the Sigma lens to be faster and snappier than that of the Nikon lens. Also, in terms of sharpness of image, I can't tell the difference - seems to produce every bit as sharp and clear an image as the Nikon lens does - at a significantly lower cost! A good solid value for the going price.
Summary: I originally was looking into the 70-300mm APO macro by Sigma and the 70-300mm lens by Canon. I chose this one because I was reading the reviews of the 70-300 by both comapnies, and it seemed that at the 300mm length the lens was very vey soft. Too soft to make a decent print. So I looked into this zoom range and it didnt bother me that it was only 200mm because I have the Canon XT and the 1.6x crop factor would make the zoom over 300 mm, which is more than I need.
Summary: There are some that slam this lens and others that praise it. You have all heard the value of the 50mm 1.8 right? This Sigma lens is close to the same value as far as cost vs sharpness. It is not as fast as a 2.8 lens but it also is not as expensive. If you can afford it get a 2.8 lens but if not then this is the lens you want.