> I'm just trying to find what shutter speed you can get with the Pi camera.

You can reduce the shutter time nearly arbitrarily, as long as you increase light intensity. I did place fast rotating propeller just above a 5000lm led, and did two 9us long flashes. See this image on how bright the two blades of propeller look, at both captured locations (the rest is dark, image was taken inside a closed cardbox, without flash everything was just black): https://raw.githubusercontent.com/Hermann-SW/Raspberry_v1_ca...