Canon updated their radio triggered flash system with the new Speedlite 600EX II-RT unit, compatible with most EOS cameras. It provides up to 2 x faster continuous burst rates, and improved heat protection buffer.
The Canon Speedlite 600EX II-RT flash replaces earlier Speedlite 600EX-RT, which launched four years ago alongside the Canon 5D Mark III camera body. The new strobe shares a lot with its predecessor, including the exact same 20-200mm coverage and top-of-the-line guide number of 60 meters (197 feet) at ISO 100. It retains the interesting dual radio / optical transmission support for wireless flash control in up to 5 groups, and has very similar styling, controls and display to the earlier model as well.
The new Speedlite 600EX II-RT from Canon offers wireless shooting via radio and optical transmission, but improves flash recycle times though 1.1 to 1.5x when using AA batteries and up to 2x with a new CP-E4N add-on battery pack.
For added coverage and functionality, the flash’s zoom head can reach from 20-200mm, with the option for wide 14mm coverage when built-in diffusion panel is used. Also, the unit can tilt from -7 to +90° and rotate 180° either right or left for complete bounce capabilities. On the back of the 600EX II-RT is a backlit dot-matrix LCD panel that displays the status and enable users to easily access and change settings. Additionally, the flash is durable with a redesigned contact construction and improved water and dust resistant sealing.
Pricing for the Canon Speedlite 600EX II-RT flash strobe is set at around US$580.