The YN568EX II Speedlite Flash Light for Canon Camera is a reliable camera flash with a power zoom function that casts light on near as well as far off areas. This camera flash has a guide number of 58 meters (ISO 100, 105 mm), allowing you to place the flash away from the subject. What's more, it adopts the unsalted gate bipolar transistor circuit design, and metal hot shoe, which is more beautiful, creditable and professional. With a recycle time of 3 seconds, the YN568EX II enables you to shoot continuously on a full charge. With the shortest flash duration of 1/20,000 second, this shoe mount flash helps you to capture high-speed objects in complete darkness.