550EX pin-out electronics question

Discussion in 'Digital Photography' started by B. Wyent, Dec 26, 2003.

  1. B. Wyent

    B. Wyent Guest

    I have a Canon 550EX Speedlite that I want to use off-camera with a
    conventional strobe slave. The strobe slave has a metal shoe, which
    visually appears to short the 550EX's E-TTL contact pins, but not the
    convential trigger pins. Tests show that the slave triggers the 550EX fine
    in manual mode, which is what I want. There is no apparent ill effect.
    Does anybody know the 550EX's electronics well enough to to say for certain
    whether using it in this way is harmful?
    B. Wyent, Dec 26, 2003
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