The main and biggest attraction of this new Canon Speedlite 600 EX-RT is that it comes with wireless triggering system, which is radio based and built inside the device. This takes off the need for a third party system. E-TTL, which is radio based allows you to acquire complete control over up to 15 slave flashes from around 98.4 feet far. The device still operates with traditional optical E-TTL method, but that shortens your range comparatively and slips in bright scenes or situations where other flashes
When the device is used with ultra pro 1D X or 5D Mark III, you can divide the remote flashes into five unique groups for a quite attractive and impressive level of innovative control. The flash is made to be more bumpy than old models, using similar materials as like found in 1D X. They have enhanced to the electrical contacts to boost better communication between the flash and camera. Additionally, the zoom range now extends from 20mm to 200mm.
If you like to control the flashes instead of keeping one upon camera, you can certainly go with ST-E3-RT wireless transmitter of Canon, which provides all the functions of triggering built into flash with less weight.
Both units are set to be shipped at the end of March. This will cost around $629, where as the transmitter will cost you around $470. Though it sounds a little expensive but it is only $80 more than the top end SB 910 from Nikon and it features radio triggering that in in-built. Everyone is eager to get their hands on this new device and so am I.