Hi. I wrote about this in dpreview - here's the link with images. http://www.dpreview.com/forums/thread/3376848 The summary of the problem is that I have a panasonic gx1 and an Olympus em5. When using identical settings and lenses with both cameras and the Polaroid pl-108af flash there is serious under exposure with the em5. I have no idea why this happens and really wanted this flash to work with the em5 properly. I now have an opportunity to purchase a metz 24 for a good price. This is probably identical to the pl108af but possibly better quality assurance and maybe will work fine with the em5. Does anyone have experience with the metz 24 and em5? Thanks!!!