I see wonderful pictures taken with Sigma 30 1.4 and then I see worrisome posts about it. I am very interested in selling my Tamron 17-50 and buying a Sigma 30 1.4. Do you think I should play this lottery? I'm very comfortable with this FL and most of my pictures from Tamron 17-50 have been around this FL. I think most of the time people complaining about focus issues with Sigma 30 1.4 are probably not taking into consideration the very shallow DOF when wide open.

I think the "Sigma Lottery" is way overblown by a rather small minority of people. I have yet to have an issue with Sigma ( and I can't say this about Canon). Go for it!

