can anyone define and explain flash sync speed in laymen's terms. it seems to me one of the more complicated topics. mainly: why can't my d80 use a faster shutter speed than 1/200 when my flash is active? the flash bursts lasts only like 1/10,000 of a sec. , so why can't my shutter fire faster than 1/200? especially outside in the sun, i'd like to use my 2.8 aperture for the shallow dof, but can't because the shutter can't go faster than 1/200 and everything would be blown. can anyone shed some light about the basics of the flash sync so a 'dummy' can grasp it???