Thanks Reed that's right. The first two photos of street light were taken by rotating the camera within the tripod collar. Manual focus was set in the first picture and than was locked to make the second one.
The next 4 photos of street lampshades were made traditionally - using the linked method. The focus has been set manually on object placed in the corner at first shot (the sharpest one).
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And when it comes to the inconsistant AF, this is another fault and it seems to me that it is a K-1 defect, because both my copy and my friends 70-200 are completely unpredictable on K-1.
While the same friend's lens with his k-3 is always perfectly accurate.
Yes, I have the Lens Align. But it is useless in this case, because the problem appears on distances of somewhere 10 meters and more. At first photo - front focus by half the distance, the next one back focus by 20 meters, next front focus by 1 meter, and another one almost accurate and so on. (another colleague has the same problem).
This is not the first defective Pentax camera I bought as a new. Five in a row of k-5 and k-5II cameras were defective. Perhaps this is just a problem for a specific batch of goods intended for the Polish market. A place where 1 euro = $1 = 4 zlotes and people have to save money 3 times longer to buy their ideal equipment.
Additionally, each time there were problems with the complaints because the service did not find any problems. They did not find any malfunction of AF in incandescent light, they did not find any problem with the mirror flop issue, the lack of flat contact pin on the bayonet mount (all ball) was not a problem too so wasn't the jamming button nor randomly displayed stamps on the upper display when the camera was turned off.
Maybe that's why the children in the photo school here have a given essays about "The reasons why you should not buy Pentax".