[popo]

In the past I have wondered if phase AF could be made to work well on main sensor. But as a side question to that, I have also wondered if contrast AF could brute force its way to acceptable continuous AF performance. I think that second option only works well if the AF system can work "faster" enough compared to the subject's relative motion speed. In effect, the subject motion needs to be small compared to the sampling speed of contrast AF functioning. As contrast AF sampling speeds increase, the effective tracking speed capability of the subject increases also. Out of interest, I wonder how many sampling operations per second a typical DSLR phase AF system takes?



As for using alpha on NEX, I think that makes great sense for transitional users. The recent EF adapter was interesting too, although it would be more so if it could also offer AF. There are times when I wish for a more "live view" friendly system that can use my existing lenses.