I have posted on DPR also but I have not been able to get the flash to expose properly. I have the flash set on the SL setting, A and 1. The camera is set on mode A, group 1 and ttl. The onboard flash and the Metz both fire but the onboard flash is all that seems to be affecting the exposure and it is underexposed by 2-3 stops. Manual exposure 1/160 at f 5.6. Any ideas why it wouldn't work?