24-70 2.8II very lackluster

[benperrin]

Also just thinking about it make sure you take some test shots on a tripod. A slow shutter speed could be your issue as there is no IS on the 24-70.

 

[Nitroman]

Use vlive view at 100% and focus on a brick wall at reasonable distance of maybe 10 feet.

If you can't get a sharp image without using the af, then the lens may well be faulty.