Originally posted by GerryL If you are really sure that it is backfocusing, you can probably send it in to Pentax.
You also have to send in the lens in question that is backfocusing.
On the k100d you hold AE-L and info buttons and turn the camera on. While fw version is showing you have to hit menu, menu, info ,in that order real fast and then you get a debug menu.
@gerry, many people do not wish to do this. It costs money and they don't want to pay for something that they can fix them selves. It means time without the camera and mostly.... different lenses need different levels of adjustment (in-body). So you need to remember the values for those lenses and change setting every time you change lens, PITA!
Hence on newer cameras the body remembers it for you and you don't have to go to debug mode to access that menu option.
mike