The Radio Wireless system uses the 2.4GHz radio frequency to control receiver flashguns. There are currently five Canon Speedlites that use the Canon Radio Wireless system: the Speedlite EL-1, Speedlite 600EX-RT, 600EX II-RT, 430EX III-RT and Macro Twin Lite MT-26EX-RT. The optical system has some limitations (shorter wireless range, for example, and issues working in bright sunlight) but also some advantages (such as the potential to use more receiver flash units than the Radio Wireless system supports). The original system is an optical pulsed light system, found in previous Speedlite models and supported in all current models (although a couple of macro light units can work only as transmitters with the optical system, not as receivers).
The more versatile is the Radio Wireless system, which was introduced with the Speedlite 600EX-RT in 2012. There are two types of wireless flash control within the Canon system. This means that the system is very versatile, allowing almost unlimited control and creativity. Each receiver group can have one or more receiver flash units. You can work with one transmitter and one receiver unit, or one transmitter and a number of receiver groups (up to five groups, depending on which wireless control system you're using). The receiver flash units are positioned away from the camera and directed towards whatever you want them to illuminate. The transmitter unit can be a built-in flash or an external Speedlite flash or flash transmitter fitted on or connected to the camera. The Canon wireless flash system is based on a transmitter-receiver relationship, with the transmitter unit controlling the receiver units. It then fires all the units simultaneously to give what should be a correctly-exposed, well-balanced flash-lit image.
Cps ir receiver series#
A series of pre-flashes will be fired and the system automatically calculates the output required from each flash unit. You just set up the Speedlites and press the camera's shutter release button. Just synchronising the flash outputs is not enough – you also need to control each output independently to give the correct amount of light for the subject.Ĭanon's wireless flash system can handle this for you, making it easy to create the images you want.
However, the problem has always been getting the exposure correct. It has been possible to work with two or more flash units almost since the day they were invented. For example, with the main light away from the camera you can provide flattering side-lighting to reveal your subject's shape while other units fill in the shadows, add backlighting or illuminate the background. Working with multiple Speedlites gives you fantastic creative control over your lighting. That's where Canon's wireless flash system can help by enabling you to fire one or more Speedlites simultaneously without any cables connecting them. While it's very convenient to be able to pop-up the built-in flash if there is one in your camera or slip a Speedlite into your EOS camera’s hot-shoe, you'll often get more attractive results by using off-camera flash.
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