C300: question about Sigma and c300 II

[Albert Rudnicki]

I am about to get c300 II and want to get some lenses for solid auto-focus.
I am thinking of SIGMA ART 18-35 and 50-100 ; any thought on AF performance would be appreciated.
thanks

 

[Eric Coughlin]

AF works good with the 18-35. Perhaps a bit slower than Canon lenses, but generally fast enough.

 

[Albert Rudnicki]

thanks Eric, any idea about 50-100 ?