flash synchronization contact造句

When the flash is triggered by the shutter's flash synchronization contact, the capacitor is discharged almost instantaneously through a flash tube, producing a flash of very brief duration almost instantaneously ( i . e ., the flash duration, often around 1 / 1000 of a second, is shorter than most practical shutter speeds, and full brightness is reached before the shutter has time to close appreciably ).
It's difficult to find flash synchronization contact in a sentence. 用flash synchronization contact造句挺难的