Do me a good piece on March 9, bought on Amazon. Materials and workmanship are good. It is easy to mount and tighten tidy thanks to the large bracket on the screws. So I have the rail fitted, screwed the flash and connected with a TTL cable. First Unfortunately, I realized. that I could no longer, or only very inconvenient to operate the vertical-grip shutter. By loosening the screw I can push the board forward. Now I could use the vertical-grip shutter. But what then struck me serious at a focal length of 28 mm intersperses the flash. That did not change when I pushed the bar back. As a focal length of 35 mm no more interference manifests itself. I guess that since but depends on the type of optics. I wonder now if I send a good piece back to me. Just take a look.