Summary: AF was too slow! Rattle sound. Not useful at f2.8 ( soft). It's not worth even at $150. I might get a bad copy because I see a lot of good reviews here.
Defective manufacturing process. No quality control. Buy from Amazon only
uzevla, Amazon
18 December 2012
Summary: There is huge dust particle that looks more like damaged glass inside of the lens (sensor side). Exactly the same damage on two lenses I ordered.
Summary: I have no issues with this Sigma lens.However I have been unable to register with Sigma UK for the 3 year warrenty.This is not UK supplied stock.
Summary: Hallo, dieses Objektiv verhilft sicher dazu z.B. NEX Kamera Systeme noch kleiner und kompakter zu machen. Auch in Tests scheint es gut abgeschnitten zu haben.