http://www.the-digital-picture.com/R...ra-Review.aspx

En la mitad de la página podéis ver unos ejemplos de como actúan las modificaciones de dichos Micro Ajustes sobre el Canon EF 85mm f/1.2 L II USM a f/1.2, montado en la 1DMk3
Justo debajo de este párrafo:

For even more precise autofocusing, the Canon EOS 1Ds Mark III allows AF Microadjustment as we first saw in the 1D III. This is an excellent feature that lets you perfectly focus-calibrate either the camera or your lenses to the camera. If a camera or lens is significantly miscalibrated, it should be sent in for servicing, but for the rest, I suggest running the lenses through the easy focus calibration procedure.
Saludos