Coming from a 4x5 camera background for many years, I've always missed the ability in 35mm bodies to have a universal mount which can use any lens. At the moment I'm shooting both Canon and Nikon. Rather than switch again from one to the other, I'm using one or the other depending on what I am shooting. The new Sony may be the best solution of all if all brand lenses can be adapted. I hope that is the case so we can buy lenses based on performance rather than brand. Motion picture cameras have had a universal PL mount for years now. Too bad still cameras didn't go the same route. I understand that a PL mount doesn't support AF or aperture but that could have been standardized too if they wanted it.