A couple of days ago I told you Sony will introduce a new 24-105mm lens along the new generation A-mount cameras. Well, the main competitor, the Sigma 24-105mm f/4.0 just got tested at DxOmark (Click here). It will not be easy for Sony to beat the IQ of that lens!
The Sigma A-mount lens can be preordered at Amazon (Click here), BHphoto (Click here) and Adorama (Click here).