Focus Tracking Differences between Sony's E-Mount and A-Mount Cameras

Historical note: While everything I state in this video is true, it is also true that Sony was able to overcome these technical challenges starting with the introduction of the A9 - years after this video was posted. I'm leaving it up just so you can marvel at how great Sony's engineers are. Yes, some of the Sony E-mount cameras have phase-detect AF points baked right into the sensor. BUT the E-mount architecture still has an inherent disadvantage when it comes to tracking moving objects in AF-C mode. In this video, photographer Gary L. Friedman gives an intuitive demonstration of the strengths of both the E-mount and the A-mount architecture, and in which situations each architecture excels. Read more detail in the blog at http://friedmanarchives.blogspot.com/2015/04/a-mount-and-e-mount-focusing-differences.html