I have gained this extension rail in order to make in combination with a compatible Arca Swiss ball head panoramic photographs. The track is very well made and I can only recommend. Thanks to millimeter scale pointing the camera in Nodalpoint is very easy and, above all reproducible. For Micro Four Thirds cameras with their lenses built quite small it has fallen a bit too long. I use the rail with an Olympus OM-D and 12-40er Zoom in 12mm position. The camera is mounted in portrait orientation (by L-rail on the camera) and at the bottom of the rail protrudes somewhat into the picture, so you have to cut off the part of the event. But there are also shorter tracks from the same manufacturer. For full-format cameras and their lenses longer the track is very suitable.
