I see many happy "Kegma" owners on this thread, love to see all the nice images. Just sold my Sigma 50EX and I'm very interested to try the "Kegma". There is one more thing that bothers me even more than front/back focusing, it's the focus shift that the 50EX is known for. Is there a similar problem with the 85EX? I know it is not really a problem when shooting wide open but I like to shoot closeups and the 50EX was just killing me at f/4-8, it just didn't work without a Live View or constant use of the DoF preview button and focusing manually. Any thoughts?