So most cameras out there (in my range) have a flash sync of about 1/180 to 1/250. But the Nikons have a crazy fast flash sync of 1/500!!! But what does this mean? I know what flash sync is, but what sort of situations would a high flash sync be an advantage? The only thing I could think of was something like a beach or snow? I just don't see it as that big of a deal if it can only be used in the limited situations I think it can. Someone help a guy out and shed some insight in on this?