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That was the best decision to buy that lens. I never regretted it.

I have the canon 35 but I rarely use it. I've heard the sigma is great and probably a better deal too!

Yes the Sigma lenses are great. I recently bought the Sigma 24-70 2.8. Amazing sharpness and fast autofocus. It also has IS and is 500$ cheaper than the Canon lens. I really can recommend the Sigma ones.