Hi. I am planning to buy one YN560 III. In fact this page helped me making the decision: Speedlight Flash Buyer's Guide - Improve Photography However, in the same page, I see that this camera lacks High speed synch option. I don't understand this. When will I desperately need high speed synch? I plan to try out "Gavin Hoey's home studio essentials" like this: Will YN560 III solve my intent? With this I also plan to buy a soft box, background flash, reflector and some background screens. Your suggestions on some economical yet reasonable products will help me a lot! Thanks.