Title: Worst Experience Ever
Product review: I wanted to use this lens with my Canon EOS-10D and I was shocked with its performance. The AF only works for objects closer than 4 feet and it does not focus on objects farther than that. First, Sigma told me that the serial number I bought was old and the lens needed updating for it to work with Canon digital SLR Cameras. I have no idea why they distribute outdated lenses to their resellers.. That's not all, I tried manual focus, and the photos came out very soft even at very small apertures (large f-stop number)After 4 weeks I get the lens back from Sigma in the same condition. I can only call this horrible service and a very bad product.My recommendation is pay a little extra and either go for the Canon EF 15mm f/2.8 fisheye or the Canon EF 17-40mm f/4 (which I did).
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