LanguagesFlash: Integrated Speedlite Transmitter
The EOS 7D SLR includes an Integrated Speedlite Transmitter for controlling remote Speedlites. This acts as a master control unit in the same way that the Speedlite 580EX II flashgun can be used to control wireless slave units. It opens up new worlds of wireless flash shooting without having to buy a master flash unit like the Speedlite 580EX II or the Speedlite Transmitter ST-E2.
Like the Speedlite 580EX II, the EOS 7D can be used to control up to three groups of slave lights and set ratios or manual power outputs for each group. The flash on the camera can also be used as part of the exposure like a fourth flash group, but because the flash has to fire to instruct the slave flash units, the power output of the built in flash is reduced to a maximum Guide Number of approximately 4. In this setting it may be used to add a small catch light to the eyes of a nearby subject, but it will not provide a large amount of light to illuminate a scene.
To aid functionality when working with a group of photographers in a multiple wireless flash arrangement, the Integrated Speedlite Transmitter can also be set to one of four channels, just like the Speedlites. In this way up to four photographers can work together without triggering each other’s Speedlites accidentally.
The EOS 7D’s Integrated Speedlite Transmitter means it can be the master unit that controls remote Speedlites.
