I bought a used 70-200 2.8 IS for my 5Dll and it seemed soft so I set up and did test shots changing the micro adjust. All the difference in the world. I then went ahead and did my new 24-105 kit lens as well, again like a new camera, all the difference in the world and I had been shooting with it for several months. The micro adjust may fix you right up.
|Black on White by RaVN11|
|Hummingbird and Bee by dibilio57|
from A Big Year - birds
|xheneta iseni _for DPReview by Mike Slade|
from - My Fair Lady - (Portraits in Full Colours Only + A Border)