TLCarney wrote:
It was the combination of the leaf shutters and flash that created the dramatic indoor sports shots in the fifties and sixties. A fast shutter speed would cause the backgrounds to be underexposed, very dark if you will, and the short range flash lighting the players. The fast shuuter speed froze the action, the basketball player in mid lay-up under the basket was the classic shot, since there was no 'synching' issues between the shutter and flash.
If you're talking electronic flash, the short flash duration is what froze the action.
The brief shutter kept the ambient light from registering as much.