Hi Alexey,
I will send files if you still think it is nescessary a this message;
The considerable distance is not between pre-calibrated values and estimated, but between initial tab and estimated/pre-calibrated.
I add illustrations where you can see the initial (calculated) values are f 7634 and the estimated values are f 8969. My question was why they are so different?
I was wondering if I should fix the initial (f 7634) value, but I see clearly now that value should not be used.(noticing this value was confusing for me.) Also distortion plot shows a lot of red (chessboard calibration); is that a problem?
Remains the question: why so big a difference.
Thanks.
Hans