Canon 600EX II-RT boosts recycle times for top-of-the-line Speedlite

The Canon Speedlite 600EX II-RT updates the manufacturer's top-shelf flash unit with faster recycle times. The unit still offers wireless shooting via radio and optical transmission, but improves flash recycle times by 1.1 to 1.5x when using AA batteries and up to 2x with a new CP-E4N add-on battery pack. The flash provides a 197ft/60m guide number, consistent with its predecessor, and the zoom flash head covers a range of 20-200mm. It can control up to 5 groups of compatible flash units, offe...