Flash slave & digital flash

Discussion in 'UK Photography' started by boothmarcus, Nov 7, 2008.

  1. boothmarcus

    boothmarcus Guest


    Can anyone explain why when i have a flash attached to a slave unit,
    it will not work with a digital camera and its own flash.

    The cameras flash triggers the slave unit & the flash is set off, but
    the picture does not show the secondry flash, only the dedicated one
    on the digital camera.

    Any help much appreciated.

    boothmarcus, Nov 7, 2008
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  2. I had exactly the same problem with the Nikon D70 & SB600 (haven't tried
    it with the D80). My notes tell me that the solution was to set the
    camera to A - Aperture Priority, when the flash becomes back curtain
    synch'd. ISTR that worked fine.
    Willy Eckerslyke, Nov 7, 2008
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  3. boothmarcus

    Woody Guest

    Most cameras actually do a double flash, first for metering, second for
    taking. Could be that the slave is going off on the first flash and has
    finished before the second - they are after all very short.
    Woody, Nov 7, 2008
  4. boothmarcus

    OG Guest

    Does your camera use a pre-flash for exposure calculation? Mine does, so
    I've had to buy a separate flash to mount on the camera so that I can use
    the slave.

    I'm told that some slave units allows you to ignore the pre-flash.
    OG, Nov 7, 2008
  5. Good point. Just had another look at my notes and realised that when I
    solved this I'd had the flash set to M (1/64 power) to stop the
    pre-flash from triggering the slave units.
    Willy Eckerslyke, Nov 10, 2008
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