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What's the guide number (power) of GH1's built-in flash?

Discussion in 'Panasonic Cameras' started by New Daddy, Sep 2, 2011.

  1. New Daddy

    New Daddy Mu-43 Regular

    Jan 24, 2011
    I recently took photos on a hiking trip using a lot of fill-flash, some with an external flash and other with the built-in flash. It was clear from the result that the built-in flash didn't have enough power to lift shades on that particular bright day, even with the flash compensation at +2 ev. With my Nissin 466 flash, I obtained satisfactory results at 1/4 power under the same circumstances.

    So, what is the guide number of GH1's built-in flash? I'd like to have a better sense of its power, so I can quickly decide whether to use the built-in flash, or get the external flash out instead.
  2. Oyapon

    Oyapon Mu-43 Rookie

    Jun 12, 2011
    14m@100 ISO
  3. New Daddy

    New Daddy Mu-43 Regular

    Jan 24, 2011
    Thanks. That's pretty weak, which I had suspected.
  4. Art

    Art Mu-43 All-Pro

    Mar 13, 2011
    San Francisco, CA
    It's pretty good compared to other cams. 14m at ISO100 is 20m at ISO200. Just to give you an idea, Oly built-in flash has GN10 at ISO200 which is 2x weaker.
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