Say you're taking a 20 - 30 secondphoto in a dark (but not completely black) environment and using flash.
If there is a moving object (say a car going past), I understand the different effects that would occur if the flash is fired at the beginning of the , or at the end of the .
But what if the object is stationary?
Two photos, identical in every respect, except one had the flash fire just after the beginning of the , and the other had the flash fire just before the end of the . Is there any difference between the resulting images?