Hello.

I have a Canon 50D,I use it with a Canon 400 L prime F 5.6,there may be a slight focus issue,where the images are not seeming to be as crisp as when I used the lens on my 450D.

This new 50D has 'micro adjust' so if I read the book,and after some tests feel there is a issue,If I adjust the camera with the lens on.What calibrates?? i.e is the camera programed when that lens is on,or is the lens programed??,So if I use the lens on a different camera-will in act like its on the 50D,or be 'its self'