Complex sentence: Flashbulbs took longer to reach full brightness and burned for longer than electronic flashes, and had slower shutter speeds (typically from 1/10 to 1/50 of a second) were used on cameras to ensure proper synchronization.
Split into simpler sentences: Flashbulbs took longer to reach full brightness and burned for longer than electronic flashes. Slower shutter speeds (typically from 1/10 to 1/50 of a second) were used on cameras to ensure proper synchronization.