Originally Posted by kkoether
I recently purchased a K200D. I called Pentax USA support to inquire about using my old AF200S from my ME Super. I was told by Pentax Support that any of the older Pentax branded flashes are fine to use on the newer Pentax Dslr's. Obviously you have to use them in manual mode but they will not hurt the electronics in the camera. Hope this helps.
I don't know if those "Smart Auto" Pentax External Auto Flash guns can be used in Auto mode or not.
On the other hand, for those non-Smart Auto flash unit, I am sure they will work, unless the user don't select the matching setting on the flash with the body settings. :-)