Can a Canon 60D trigger a 430EX II wirelessly without the pop-up flash lighting the scene?
Asked 9/11/2014
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I’m using a Canon 60D with a Speedlite 430EX II off-camera. When I use the 60D’s built-in flash as the wireless master, both the pop-up flash and the remote flash appear to fire. Can the 430EX II be triggered remotely without the built-in flash adding light to the exposure? If so, is this a setting on the camera or the flash?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
11y ago
2 Answers
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The 430EXII supports Canon's now older method of remote flash triggering, which uses flash pulses from the commanding unit to trigger the remote unit (430EX in this case). The newer system, based on radio, is supported by the 600EX-RT, and ST-E3-RT units.
Your system uses flash pulses, which fire BEFORE the shutter opens. So, even though you are seeing the flash on your 60D fire, it isn't necessarily contributing to lighting the scene, depending on how you have things configured.
The newer 600EX-RT system does not use flash pulses, so this problem does not exist. It can, and is supported by camera models that do not have a built-in flash, such as the 5DMkIII and 1DX.
Originally by user4880. Source · Licensed CC BY-SA 4.0
user4880
11y ago
0
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Yes, but with a limitation: the 60D’s pop-up flash must still emit control pulses to trigger and communicate with the 430EX II in Canon’s optical wireless system. So it cannot be completely dark while acting as the master.
However, you can set the built-in flash so it does not contribute meaningful light to the final exposure. The visible pulses you see are mainly pre-flashes used for communication and E-TTL metering, and for normal shooting distances they usually won’t affect the image.
The setting is on the camera, in the flash control / built-in flash wireless settings, where you can choose for the pop-up flash not to contribute to the scene while still controlling the off-camera flash.
If you need triggering with no visible master flash at all, that requires a different system, such as Canon’s radio-based RT flash system or another radio trigger solution.
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