Now using AF assistant in camera to confirmed in focus, this sequences no af micro-adjustment and start lens on close distance then turn focusing ring to infinity direction until the AF assistant sound beef and green confirm dot appear.
the sequence start from aperture f/1.4 to f/5.6 with one time focus at f/1.4 the rest remain same focus point (no re-focus).
For me, the focus shift effect very very little, the "Focus here" sharp on all aperture. (at least enough for me)
**next sequence "AF micro adjust to +16" please wait.**