Is an on camera transmitter required to operate the 600 EX speedlite on my 5D II off camera?
Hi! Your camera will need some way to communicate with the 600 EX if the flash is being used while off your camera's hot shoe. You can accomplish this wirelessly with an on-camera transmitter, or if you don't mind a cable, you could use a camera-specific cable to communicate between your camera and the flash. I have loved my 600EX beyond measure! Be sure to take advantage of light modifiers like soft boxes or the Rogue Flash Benders to soften the 600 EX's flash for indoor candid shots. Enjoy!