I'm new to MFT and new to this forum I purchased an OM-D E-M1 recently and so far just LOVE it - I'm seriously considering selling my D800 and lenses I was wondering how useful C-AF + TR is. I haven't used the same function on my Nikon. I shoot at kids high school sports events (Haven't tried the E-M1 there yet) with C-AF - I generally can point the camera at the subject, and let the camera focus. the subjects are moving/running. why would I want to let the camera try to track a subject instead of centering the camera on the subject and let C-AF do it's thing ? are there situations like birding or something where this is critical ?