Sometimes you can get away with going beyond the flash sync speed without any problems but its best to stay below it. Bear in mind the flash will freeze the subject somewhat more than the shutter speed will anyway so for panning, 1/125 might be enough...
Sometimes you can get away with going beyond the flash sync speed without any problems but its best to stay below it. Bear in mind the flash will freeze the subject somewhat more than the shutter speed will anyway so for panning, 1/125 might be enough...