Summary: I just received the item and taking my first test shots with this lens. Even before fine tuning (calibration), I am pleasantly surprised with the quality of the results. The image at f/2.8 seems a little soft to my taste, but nothing alarming, all lenses perform not at their best when fully opened. Stopped down at 5.6 things start to get much much better, and at f/8 this lens really begins to shine.
Excerpt: I wanted a lens that has a zoom range of at least 18-250 mm. I called B&H Photo about such a lens and they recommended the Sigma 18-250 DC MACRO OS Lens. I decided to give it a try. When the lens arrived I used it to take pictures almost immediately. It arrived on a Thursday and I used it the following Sunday. I found the lens to be very versatile and very good at taking wide angle pictures when set to 18 mm and even just as good at the maximum 250 mm.
Excerpt: I've only had this lens a couple weeks and have only been able to take test shots of pets and family/friends. Thus far I'm extraordinarily pleased with its performance, especially considering the price. This was my upgrade from the standard 18-55mm pentax kit lens. The Sigma produces very sharp images with no chromatic aberration (until you blow-up the pictures to full size on a giant monitor and even then its very faint).
Summary: I got this lens from Amazon. The delivery was prompt and the item arrived in good condition in a protected package. I am using this lens with my Canon T3i. It has been about of week since I got this lens. Overall color reproduction and the picture quality is very good through out the 18 - 200 mm range. I am very satisfied with the performance of this lens. However, you should note that the motor of this lens is a little noisy and at times you may be able to hear this.
Excerpt: The product was in great condition, arrives very soon, this lens its a very good choise if you work on music events, I also have the canon 18-135 but I needed another lens similar, sigma 18-200 was the answer.
Pros: Consistent Output, Durable, Easily Interchangeable, Strong Construction
Excerpt: I used this lens during a wedding last weekend and it performed really good. I have no bad things to say about it. I loved that I could keep just one lens on my camera for basically the whole day. I'm sure you will like it!
Excerpt: I wasn't sure what kind of zoom to buy for my camera. I found B&H extremely knowledgeable and professional. They were honest with me in every way. He explained the differences between the Canon and Sigma Lenses, gave me a great deal and did not at all try to oversell me. He sold me exactly what I needed and I LOVE the lens, it was a perfect choice and fit for me. Thank you B&H!!!!
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Strong Construction