Clarification first: by "focus tracking", I mean the ability of the camera to change the focus point as the subject in the initial focus point moves, as a result of either the subject's movement or the camera's movement. By "focus tracking", I do not mean the camera's continuous focusing speed, although AF-C is a necessary condition for focus tracking for the obvious reasons. (I make this clarification at the outset because a lot of the discussion about "focus tracking" on the internet just deals with AF-C speed, where the user fixes a focus point and pans the camera along with the moving subject, like race cars or horses. While that is also one index of the camera's function, that's not what I'm interested in here.) Background: I'm looking for better "focus tracking" in m4/3. For moving subjects without regularity in the trajectory (like kids), its value is obvious. Because my first generation m4/3 do so poorly tracking moving subjects, I normally use my Nikon for moving children. Even for relatively stationary subjects, "focus tracking" would come in handy because I focus and recompose a lot. i.e., the camera moves this time, not the subject. Under this scenario, my first generation Pannys track relatively well, but not always. It often loses the subject and locks focus on something else entirely or some other part of the subject after recomposition. As a result, I generally rely on the traditional fixed focus point in the center with AF-S and recompose, or, if I have enough time, move the focus point with the joy stick. With newer m4/3, I guess you can use the touch screen to change the focus point, but focus-and-recompose being such a habit of mine that is used across different systems (some of which don't have touch screen for focus), I'd rather have a good "focus tracking" than good touch screen AF. Question: How is the focus-tracking in E-M5 or E-M1? I've seen and read some reviews on the internet with mixed responses. Some were positive, but I wasn't quite sure that those positive responses were based on "focus-tracking" in the sense that I use it here, rather than continuous AF with panning.