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Can Canon T7i trigger an unmounted 430EX III-RT? Yes. The built-in popup flash on the EOS Rebel T7i/800D can act as a master flash to control an off camera 430EX III-RT flash. The camera side of things is covered on pages 220 and following of the EOS Rebel T7i/800D Instruction Manual. The flash side of this method is covered on pages 71 and following of ...


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The existing answer is true only for mid-range cameras. Low-end and high-end cameras do not have the "easy wireless flash" functionality. High-end cameras do not have it, because they lack the integrated flash. For those wondering the same for low-end and high-end cameras, to trigger 430EX III-RT, you can use either Canon ST-E2 infrared trigger or Canon ST-...


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Yes, your camera can control your flash using optical communication. See page 217 and following of the Camera manual. You of course have to set the flash to "optical slave" mode ("lightning" icon) and make sure it is on the same channel as the camera. Tip: in the camera flash settings, you can set the lighting ratio between the camera and the external flash,...


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