I would appreciate any help setting up a Metz mecablitz 15 ms-1 macro flash to work properly on an OMD 5 mkII. I am using the flash that came with the camera as controller with the IR - filter clamp that came with the Metz attached. The camera is set to RC mode and I have configured the Metz flash to use the oly mode. The problem is that the photos are underexposed by 3 steps or more, and this is not easily fixed with exposure compensation. Longer distances (2-2.4 m) come out almost completely black. When using the 15 ms-1 manually with a sync cable the output is much stronger and I can achieve correct exposure. But how do I make TTL exposure work with the Metz mecabilitz 15 ms-1?