I am a macro photograpoher who just bought the k10d unaware that it cannot be used for macro work (as they have dropped the TTL standard making my genuine pentax 140c flash useless). Has anyone out there found links to flash sites that talk about p-ttl capable macro flashes. I have found that Sigma will have a unit available for the pentax mount later in the year. Any other leads ?

Hi,
I use the 140c a lot in my specialist macro work. It is very consistent and is the smallest unit I have seen (great in real field work as it peresents a smaller object to the insects I am bothering). It does not have an external power supply alas, but pretty good recycle times. And it does have modelling lights which I use at night chasing insects around, though this of course depletes the batteries much faster.
However if you have any but the istD or istDs bodies, the TTL format has been droped by Pentax. A great shame.