I can not understand the positive reviews and very doubt as to the authenticity of this! Not only that the rings wobble heavily on the camera, and the contact with the camera is not always functional, there must be wobbled also here on the rings, so that really times contact. However Furthermore you then can not even take pictures mostly because the camera without autofocus error messages shows that the communication fails to Lens. My conclusion: Stay away! Rather spend 3 euros more, this is definitely a waste of money!