I use the Di622 on Nikon SLR cameras, since now 5 years, first on the D300, then the D7100. But no matter what settings I make on the camera, the images come basically in TTL by 1 to 2 stops too dark. If you compare the flash level manually, so it usually works better - you always have to first do some test shooting - and adjust again in another lighting situation everything! If you have then times found the right attitude, so the pictures are really good. Since I mainly do landscape and nature photography and not much to photograph with flash, so far I could live with these problems to some extent, but whenever I'm in charge, etc. at a family celebration take photographs, I resolve, finally zuzulegen another flash ...
