I made the firmware upgrades to present. Did an auto focus test. Put the 35mm 2.0 on f2 began walking toward a still subject at 3fps. To my surprise all the frames were in focus from the first to the last. This indicates that there is some focusing happening between frames at continuous shooting?, and with drive set to single shot, not continuous (on camera body). Hmmmm maybe that was part of the firmware updates at some point in the firmware history. Obviously a huge discovery for the street shooting i do.