Feel free to shut me down right away on this but I got to thinking. Why doesn't somebody make an adapter (i.e.: Nikon->Canon) that has a conversion chip to allow for autofocus? This is probably a very nieve question but I thought I'd throw it out there. I know that there is AF beep chips and so forth. Is the wiring and connections just so much different? Are the autofocus "brains" in the camera different? Thoughts?