I recently purchased my first flash Canon 580 EX II. I am interested in HSS (water drops, fast action shots, etc) .What should be ideal setup for this kind of photography.
1) How many flashes do I need for high speed photography (HSS)?
2) If I want to use 2 or 3 flashes, do they all need to have HSS capability?
3) What will be my cheaper options? Youngnuo has enough versions to confuse me.