The Speedlite 600EX-RT is a high-performance TTL flash unit designed to meet the expanding creative needs of modern professionals. Integrated radio frequency triggering, in addition to standard infra-red wireless flash control, allows photographers to achieve exciting results with complex on-and-off-camera lighting set- ups. Using one master 600EX-RT or the new ST-E3-RT radio-frequency wireless Speedlite transmitter, up to 15x 600EX-RT flash units, positioned up to 30m away, can be remotely triggered – offering great potential to experiment with more creative lighting techniques and effects. EOS cameras with a connected Speedlite 600EX-RT can also be triggered remotely by either model, allowing photographers to explore more extreme shooting angles to produce surprising and inspiring creative results.

Subjects over a wide range of distances can be lit creatively or evenly exposed, thanks to an increased guide number of 60m and wide lens coverage of 20 – 200m. For wide-angle shots, a diffuser adapter can also reduce the focal length to 14mm and the bounce-and-swivel flash head creates more flattering, shadowless effects. Ideal for shooting portraits, a catch-light panel produces natural catch-lights in the eyes of a subject when shooting with bounce flash. Additionally, custom flash coverage options provide more creative scope by using guide number priority to light the subject, while creating slightly darker edges to the frame.

Like its predecessor, the Speedlite 600EX-RT communicates white balance settings to the camera through the hot shoe connection. However, to further balance flash and ambient light, a new colour filter adapter and two supplied colour gels can be fitted to balance the temperature of the flash and create a more natural effect when shooting around tungsten or mercury lighting. When shooting in dark conditions, photographers can also employ the AF-assist beam for accurate autofocus with lenses of 28mm or longer, ensuring the subject remains in focus when the flash fires.