Flashing the Canon Powershot A720 IS

Discussion in 'Canon' started by Dudley Hanks, Jun 9, 2008.

  1. Dudley Hanks

    Dudley Hanks Guest

    For some time, I've been trying to get my old Speedlite 540 to work with my
    A720, but I've had problems with the auto modes.

    The flash, when triggered by an optical slave, would work fairly well when
    the power output was at or below about 60%, but would produce dark pics as
    the power level neared full.

    I tried a number of different tactics to get the flash to work properly with
    higher outputs, but nothing worked. Then, I realized it's because of the
    little pre-flash that the A720 fires as an aid to determining proper
    exposure. At lower levels, the 540 produces two, quick flashes, the first
    one helping the A720 to determine proper exposure, and the second to
    actually eluminate the exposure. However, on higher output levels, the
    flash can't recharge quicly enough to produce a second flash.

    While I wish I could use the flash at full power, I guess I'll just have to
    be happy using the 540 and my HF DC-1 in conjunction with each other when I
    need greater output.

    Now, if I could just find a way to get my HF DC-1 to work properly when the
    A720 is in manual mode.

    Any suggestions?

    Take Care,
    Dudley Hanks, Jun 9, 2008
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  2. Dudley Hanks

    Vance Guest


    There are slaves available on ebay that will ignore the first flash
    and only trigger on the second one. An example would be the Wein
    Digital Peanut slave with a range of about 100'. It costs around
    $40.00 USD from an source like BHPhoto. It uses a PC connector, but
    you can get a hotshoe adapter with a PC connector to go on the 540.

    Hope that helps.

    Vance, Jun 11, 2008
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  3. Dudley Hanks

    Dudley Hanks Guest

    Thanks, Vance, that does. I've got a couple of slaves, but they are
    triggered by the first flash as well. I'll check for the more modern
    version and pick one up.

    That's one of those things I probably should have thought to check at the
    photo store, but it just never occured to me.

    Once again, thanks for the info.

    BTW, I've just finished writing part of Dima's tribute, and I hope to be
    posting the page soon, along with the photo you re-worked. But, I probably
    won't get it done till after holidays.

    Take Care,
    Dudley Hanks, Jun 14, 2008
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