Another reason that the R is perfect for our old eyes... I use AF but touch up focus sometimes. The R rewards me with manual focus "assist" with focus highlighting or the focus arrows. If the R picks the wrong eye (in my mind) I instantly make minor adjustment and fire. My actual success rate is higher than I had with the EOS DSLRs.The fly in the ointment regarding AF accuracy is that as we age our eyesight diminishes, sadly, I would not go for manual focus.