Question about Cameras
Cannot get my speed lites 550EXII as a master unit and my 550EX as a slave unit to fire in syn ch in TTL mode. The 550EX wants to lag behind or fire after the 550EXII (master unit ) fires. What can I do to have them both fire together with the 550EXII being the master unit on the camera.
From what I've experienced the slave need to be set to B-1. Don't know why.
Posted on Nov 04, 2008
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Posted on Jan 02, 2017
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