I am well aware of sync charts but it is really helpful your posting them.
Originally posted by Not a Number K5II specifications from English manual page 317 : Shutter speed: Auto: 1/8000 to 30 sec. Manual 1/8000 to 30 sec. (1/3 EV steps or 1/2 EV steps), Bulb
Yep it says this. So it shows capable of doing both 1/2 & 1/3 steps most modern cameras will and are selectable so I don't get your point in showing this.. But I do stand slightly corrected, I mainly use 1/3 steps with my camera. Setting it on 1/2 mine will go to 1/180, per your post and charts, but wont go to 1/200 even using ISO 80 or at least it didn't when I tested it. Given that then it wouldn't matter if one were using Expanded Sensitivity or not as long as one uses 1/2 EV it will be limited to 1/180. I like mine at 1/3 showing going to 1/200 at ISo 80 so I will keep it where it is and use my other ISO's accordingly. Granted this is not an option with any other Pentax cameras that do not have ISO 80 capability and setting them on 1/3 EV will limit them to 1/160 sync as indicated in your posted charts.
Originally posted by Not a Number When set to 1/2 EV steps 1/180th sec will be an option when using the eDial to set the shutter speed.
Yep it will and at 1/3 EV 1/200 showing will be an option if one is using ISO 80 and 1/180 at ISO 100+.