Canon announced that in January it will be possible to remove the problems associated with the operation of Speedlite 600EX-RT.

The problem concerns the Speedlite 600EX-RT and trigger ST-E3-RT. It consists in the fact that shooting combined, and flash photography – in transmission mode radio – does not work in certain modes settings. The problem occurs if the combined seven or more units. If the connected six units or less, then the problem does not occur.

Lamp Canon / photo. manufacturer

The above-mentioned problem for models whose serial number – on the 3 and 4 positions – includes a number of areas:
  • The Speedlite 600EX-RT: [xx01xxxxxx] ~ [xx13xxxxxx]
  • Speedlite Transmitter ST-E3-RT: [xx01xxxxxx] ~ [xx03xxxxxx]

Canon adds, however, that if the spot on battery model in which there is a problem, is marked as the ones below, a malfunction does not affect you. The ability to repair faults will be available from 4 January 2016, and the equipment should be delivered to the site in person. Source: Canon