I recently tried using my Olympus' wireles RC mode with my Sigma flash (Pentax mount). It worked, but for some reason the power dropped dramatically. To the point where it was useless as an off-camera flash. The camera is in RC wireless mode, and the flash is on slave mode. The flash says it is on full power (1/1), but there's just not enough light to even constitute fill flash. When I put the flash back on the camera, the power goes back to normal. I understand there may be complications with using a non Olympus flash unit wirelessly with an Olympus camera. But even if the wireless is just used as a trigger, it should provide better results than this. I'm talking 4-5 stops difference in exposure atleast between the light when the flash is off-camera to when it is on camera. Is there something I'm missing? I've read both the Sigma and Olympus manuals to no avail. Any help would be greatly appreciated.