Sigma 35mm ART and 6D's outer focus points

Dear all,

I have already posted regarding micro-adjusting the Sigma 35mm ART using central focus point. I think I have now reached satisfying MFA values (using the dock) even though it is still a little problematic at some distances.

But I am not very satisfied with the results with focus point other than the central one. I am fully aware 6D AF is not the best in class and they are not cross types but I think I could reasonably expect them to provide a good focus accuracy @1.4 in good light. But the AF is consistently bad.

I have contacted Sigma France, but for now I have only been able to have generic answers but no detailed ones. Has anyone had the same issue and do you know if Sigma is able to tweak the lense so it's able to‎ focus at all distances using any focus point. I do not want to pay for shipping and be without my camera for 3 weekds and it does not solve the issue.

Thanks for your help!

Jeremie

Did you buy it new? Is simply exchanging it for a new one an option?

Unfortunately this is not an option. Had the lense for X-mas and I got it after the rend of the return period