Originally posted by andy271 if i focus on say a tree and i want to focus on another part i have to focus on something else then refocus on the part of the tree that wouldnt focus and today i tried to focus on a small branch with a floer on it i just could not focus on it it focused on the bark so i think it is back focusing its a nitemare i need to do more testing
The first thing you mention is actually a useful and recommended technique for ensuring accurate focus with PDAF when distance changes are minuscule. Your second observation may be due to the fact that PDAF focus point areas are larger than many users expect and may hence struggle to pick up the subject area intended by the photographer. I tried to indicate above that for such scenarios, prefocusing (automatically or even by hand) may well be the better option.
I may be wrong, but I have this hunch that the "nightmare" you're describing may at least in part be due to unreasonable expectations of what even a perfectly functional PDAF will do. At any rate, I would advise against messing around in the debug mode of your K-1, unless you can be absolutely sure that (a) your lenses really need that much calibration, and (b) you know what you're doing in the debug mode (which is a bit akin to open-heart surgery).