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Canon 20D Flash Underexposure - Photography

Anybody troubled with flash underexposure from his/her 20D? On mine, when flash is the primary light source, 1 or 2 stops of exposure compensation seem to be needed to get the correct exposure. This, with both the built-in flash and with a 580EX. Canon seems to be unaware of the cause. I'm hoping for a firmware upgrade atraveler...

  1. #1

    Default Canon 20D Flash Underexposure

    Anybody troubled with flash underexposure from his/her 20D? On mine, when
    flash is the primary light source, 1 or 2 stops of exposure compensation
    seem to be needed to get the correct exposure. This, with both the built-in
    flash and with a 580EX. Canon seems to be unaware of the cause. I'm hoping
    for a firmware upgrade

    atraveler


    atraveler Guest

  2. #2

    Default Re: Canon 20D Flash Underexposure

    Fear not-- you are not alone. Something to do with the new exposure system
    and attempting to preserve the highlights. Numerous reports, although the
    work-around right now is to bump up flash exposure compensation (FEC) by
    +2/3. Search the threads in the www.dpreview.com forum for the 20D for MANY
    discussions of this situation.


    "atraveler" <rr.com> wrote in message
    news:YASDd.16097$texas.rr.com... 
    built-in 
    hoping 


    Chester Guest

  3. #3

    Default Re: Canon 20D Flash Underexposure

    "atraveler" <rr.com> wrote in message
    news:YASDd.16097$texas.rr.com... 
    Oh, Canon is aware of it. It is a consistent problem, not only with the
    20D, but with the 1D mkII. I think it is a fault in the new ETT-L II
    cutting the power of the flash too much in relation to distance to subject.
    But that's just my theory.
    I returned the 580EX we bought, because it didn't solve the exposure
    problem. We get excellent exposures with the Quantum T4D flashes that we
    rent, but my wife wanted something a little less bulky for general
    photography. My 420EX seemed inadequate, but the 580 was no improvement.

    --
    Skip Middleton
    http://www.shadowcatcherimagery.com


    Skip Guest

  4. #4

    Default Re: Canon 20D Flash Underexposure

    {FU set to r.p.d.}

    Skip M wrote: 

    Is there any difference in using ETTL with the camera in auto mode vs.
    manual in terms of the underexposure problem? I am still experimenting
    with the 550EX and the 20D.

    I may go to all manual, as I'd just as soon the ups be mine vs. the
    camera's.

    --
    John McWilliams
    John Guest

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