[Klaus]

I'm somewhat surprised by the performance of this lens (although it isn't perfectly centered)

 

https://photozone.smugmug.com/Sigma-150-...temporary/

 

[davidmanze]

Positively?

[Klaus]

Well, Sigma claimed that the center performance is comparable to the Sports and only the borders/corners are worse.

I can sort of see that in the MTFs. Thus I'm positively surprised.