Canon Speedlite 600EX-RT -Wireless Radio Multiple Flash System -TTL, E-TTL II & A-TTL Compatible -GN 197' (60 m) @ ISO100 -Exceptionally Dust- and Water-Resistant -Zoom Flash Head: 20-200mm Range -Dot Matrix LCD Panel and Backlit Button -Color Filter Holder for Gelatin Filters -18 Custom Functions -Full 180-Degree Swivel in Each Direction -AF Assist Beam
Canon Speedlite 600EX-RT As a Canon top-of-the-line flash, the Speedlite 600EX-RT takes the best features from existing models and adds functionality for enhanced digital photography. The 600EX features a new wireless multiple flash system using radio wave communication that provides more precise control over as many as five groups of flashes. There's also more power, with a guide number of 197' (60 m) at ISO 100, a zoom flash head that covers a 20-200mm range. Compatible with the AF frame of all EOS cameras, the Speedlite 600EX-RT even works perfectly with the 61-Point High Density Reticular AF found in the EOS-1D X and the EOS 5D Mark III.