ohh, i forgot to add... I have an old Nikon FE that should flash sync at 1/125 but I think that speed must be fast as whenever I set it to 1/125 I get the black section, so I try to remember to set it to 1/60. You could try 1/30 or possibly even 1/15... If the flash is doing all the work (ie there's not much ambient light contributing to the exposure) you'll be ok with camera shake as the flash is much faster and you'll still get sharp pics (asuming your focusing is correct of course)