Thanks, G

The notes with the upgrade aren't terribly explicit, but I understand it better now.
Chrispy

Thanks Dan, that's most helpful.

It looks like it'll be a Pentax flash for me!

Chrispy

I have just bought a K10D and I have 2 questions.
1) I find my Metz meccablitz 40 MZ-2 isn't fully functional (ie it doesn't work in TTL mode). It worked perfectly with my *ist D and Z1P. Is it me having not read the K10 D instruction book properly, or is it, as I suspect that Pentax have done something to prevent non Pentax Flashguns from being fully functional?
If the latter is correct, I think I'll lash out and buy either an AF360 or 540-FGZ. Although I don't use flash a lot the idea of wireless flash is attractive to me. Now here comes my second question.
2) It seems that to work the wireless flash you need 2 FGZ flashguns, but the firmware upgrade has changed this, but I'm not sure how. Can wireless mode now be used with only one flashgun?.
If anyone can answer these questions, I'd be grateful.