Yes, Before I buy my first Sigma Lens 50 mm. F/ 1.4---I compare with Canon Lens 50 mmm. F/ 1.4, and I read many Compare/ Review both Lens, And in the review tell me that Sigma Lens* in this Category is Better than Canon Lens in the Sharp area, and in the Color Contrast Area---BUT COST MORE THAN CANON = $ 50 US Dollars.
Yes, I buy this First Sigma Lens and Very Happy of this Big Babe.
Yes, I have 14 Canon Lenses, 2 Tamron Lenses, 1 Bower Lens, and 1 Sigma Lens---From 8 MM. Fish eye Lens to Canon EF 600 mm. F/ 4.0 L IS USM.
PS. AF. for Sigma Lenses are not good or FAST as Canon Lenses*