The E-M5 SCP has A,B,C, and camera flash modes, with FP TTL, FP M, off, a M value, a Normal flash and Super FP flash settings. Is there a guide for using these settings? I also have a Opus Pro H150 light, which flashes sometimes, and other times it doesn't. When it doesn't flash, it seems that the on-camera flash isn't triggering the flash. Any idea whats going on?