I bought this lens for indoor use at family gatherings and landscape photography. I knew it was a fast lens (f/2.8) but was surprised by its physical size. I was also amazed at the size of the filter required. Anyway, I gave the lens to my son (we both shoot with the Nikon D50) and he LOVES this lens. He's taken hundreds of pictures with it and the ones I've seen are GORGEOUS. Sharp and clear. I should mention that I chose the Sigma 18-50mm because it was physically smaller, uses the 58mm filter size readily available in my camera bag, and costs about $200 less.
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