I use the 300AFD,

It lacks a sync socket and only has bounce & zoom head (no swivel) - I don't know what features the top of the range Pentax has so can't comment further.
The lack of a socket to allow TTL operation off camera is the feature that I miss.

Haydn

John,

I think this is the site you mean http://www.botzilla.com/photo/strobeVolts.html - lists trigger voltages for many flash guns, however what I really need to know is what voltage is safe for my camera?

I've seen a post on here which suggests that Pentax DSLRs are safe up to 300V - not sure that I want to test that theory with my camera though.

Haydn

Is there a definitive answer to the safe trigger voltage debate ?

I'd like to play around with some portrait work but would have to use various combinations of old flashguns (Vivitar 285 and an old Centon) to try to achieve the right lighting effect but I'm wary of connecting anything that may fry the cameras electronics.
The camera is by the way a Samsung GX 1S - do I get drummed out of this forum for that ?

i'd be grateful for any help/advice.

Haydn