And before you reply and say you want your lens to work stright out of the box, well if thats the way you feel you are best sticking to Canon, but for the sake of £35 for the dock, all the AF issues will go away, and in my book its worth the small bit of hassle at the start.
Each to their own though, you will always get Sigma haters etc
Might be worth mentioning that even if you stick with Canon, your lens may not work straight out of the box. I've tried and tested over 20 lenses from different brands (not counting MF lenses), only 3 didn't work properly out of the box. All 3 were Canon.
Yet I don't go around disparaging the Canon brand and I still own more Canon lenses than any other brand. Why? Because I choose the best tool for the job. Sometimes that is Canon, other times that is another brand.



(24Lii, sigma 50A, 135L), and for the other ends of the spectrum, sigmaEX 14mm2.8 and sigmaEX 100-300F4.
