The lenses will actually fit all of the 645 series cameras as well, including the AF body, we used a manual focus lens on an AF body just a couple of months ago, and it was reported in a thread that was pretty extensive also, up to the AF body, the inserts are interchangeable and then you have various finders, my TTL prisim has fit my M645, 645J, 6451000 , the pro TL is a different camera, but will still take the same inserts, other than the AF, even if it uses a back the camera will still take the same insert.