DESCRIPTION

Canon's top-of-the-line hot shoe flash is the world's first flash to include built-in wireless, radio flash control. It has a guide number of 196.9 ft./60m at ISO 100 (depending on zoom), 180-degree swivel, a zoom range of 20 to 200mm and a flip-out panel that increases the wide zoom to 14mm. It can control up to five groups of flashes from 98 feet with the radio control. It's also dust and weather sealed.