Your question is not clear. I assume you are asking if there is an adapter that would allow an A-mount lens to be used on an m4/3 camera and not the reverse. Is that correct? If so, then the answer is yes. I have one. Note, that A-mount lenses do not have an aperture ring, but they do have a mechanical aperture mechanism. The adapter I have has a ring on it that when turned engages the aperture lever in the lens and adjusts the aperture. You cannot set the aperture to a specific setting such as f5.6, but you can adjust it. If you use aperture priority mode then the camera will select the shutter speed. I got the adapter and I used it to mount an old A-mount macro lens to my Olympus E-M5 and Panasonic G3, but I have never used it. I just mounted everything to see that it worked when I first got the adapter. The only reason I got the adapter was to use the macro lens, but earlier this year I got a very nice manual focus macro lens and bought an adapter for it. It is much better and easier to use since it has an aperture ring and also because the lens is smaller and lighter than the A-mount macro lens.