Originally posted by Rick Clark Today I put my full auto Ricoh flash 30 years old on the K5 and went nuts in the house with flash. I bounced it at all angles 6 times each and not one problem.
Rick: just to clarify, as I understand the problem, it has to do with:
1) full p-TTL flashes (the Ricoh you mentioned is running in Auto-thyristor mode and that works well even w/ the Nikon flashes I use o my K20D)
2) only if you put the p-TTL flash on the hotshoe (if you take it off the camera, then use the popup flash as a wireless commander, this overexposure randomness doesn't happen)
3) seems to be some sort of communication issue via the pins on the hotshoe, so it should be fixable via firmware unless it's a hardware problem on the board
Sounds like a workaround might be to use the popup flash and hold the 540 in your hand so it's triggered wirelessly.
I'm not sure if the K-5 disables SR when using the popup flash as a commander like the older K10D/K20D did though...