On my first day visiting Stockholm there was a lot going on in the city!
This is a photo experiment during +Nike
A couple times before I had fun with the GH4 face-detect AF but never tried it in a very difficult situation.
The lens used (14-140mm f/3.5-5.6) is not so sharp nor fast, and I used the camera electronic shutter as the mechanical one introduces vibrations adding a vertical blur. The electronic shutter limits the ISO to 6400 and increases the noise, so all in all: far from ideal setup. These are the camera's JPEG because due to time constrains.
Nonetheless, this was a lot of fun and I'm sure I can improve with some more practice, especially at anticipating and tracking the subjects' movements. There's a lot of headroom for improvement in framing too.
Single point AF might be able to do the job as well but AF detection, finding the closest eye is something else :)
First pics are before the race, then after next to the finish line.