The design of the adapter is very good, especially the ability to swing the camera away from the eyepiece without disturbing the alignment. However, the construction leaves much to be desired. One glaring problem is that the screw that is supposed to hold the two main parts of the adapter together is too short, and as a result the camera is not held solidly. I replaced the supplied screw with a longer one, and used some Lock-tite on the threads, and that seems to have solved the problem. It's obvious that the manufacturer never actually tested the production adapter properly. After replacing the screw, the adapter worked OK.