Originally posted by paranoia23
the question is ... why?
I think there are quite a few threads that explain this. But here goes!
You see, the AF system is not wrong. But the AF system and the lens are made to certain tolerances. And sometimes those tolerances are on the other extremes and this creates a problem. And in those cases, its great that we have the option of AF adjust. Some brands have very tight tolerances and their cameras even get adjusted to the lenses you buy with them in the factory. But these brands (Leica) cost 10 times as much for every piece of gear. Oh, and even for other brands, professionals often send their camera and lenses in to a service centre for adjustment.
The K-x and K-r have global adjustments (not per lens, unfortunately), and the newer cameras will remember the adjustments of up to a certain number of lenses. Oh, and one more thing, live view uses a different type of AF, which doesn't need AF adjustment. (this is why the K-01 doesn't even have an option for lens adjustment) So you can try using live view and focus peaking. But CD AF is a little slower, especially with lenses that have a high minimum f number.
Its a little annoying that you would have to change the AF adjust every time you switch between those lenses, so you can try sending them to a service shop for them to calibrate the lenses to the camera. But this might cost you a little, and it might not even be possible with some lenses. Beyond that, your other option is to learn how the AF behaves and adjust accordingly, or use MF with those lenses. For macro purposes you should probably use MF anyway.