I haven't personally used this but it seems that the Canon 50mm 1.4 is similarly priced. I would say the Canon is less likely to have any of the focusing issues that Sigmas are known for, also if you were to ever re-sell it, Canons hold their resale value much better than any third party manufacturer. However comma, I do own the Sigma 50-150mm 2.8. I went with this option because there wasn't a Canon alternative for the same price, I have yet to have any issues with it, in fact I love it, but if there is a Canon option for a similar price I would say that is the safer option. Good luck with whatever you choose -Matt