Thank you guys

1- Distance: I have tested at 3feet, 5 feet and approx 10 feet. I did this because I know the 50L has some shifting issues at short distance. B

2- Number of shots: Usually, My approach: I take 2 shots at each AFMA for each distance let's say I start with at 10 feet:

1st iteration: -20, -15, -10, -5,0,5,10,15,20

Then I take a decision (on screen) for which I am going to dig deeper: In this case, between -10 and -15. I restart the process and take 2 shots each

2nd iteration: -10,-11,-12,-13,-15

I decided to keep -10.

I seemed to have consistant results in terms of distance and repeatability.

Problem occured that when I had taken down the camera and take normal picture of writing...I notice the result is poor!

So this is why I do not know what is faulty !

again, I appreciate your help.