Do Pannies jack up ISO when fill-flash is used in daytime?

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

  1. New Daddy

    New Daddy Mu-43 Regular

    Jan 24, 2011
    I noticed that the ISO of a daytime photo in which a fill-flash was used was set at 400 under auto ISO. I can understand why my GH1 did that; it must have surmised that the ambient light was insufficient based on the fact that I was using the flash. As a result, the sky and a pond in the picture are badly blown.

    Do Pannies' algorithm jack up the ISO when fill-flash is used in daytime? If so, I'll make it part of my workflow to set the ISO around 100 in daytime going forward, instead of relying on the auto ISO.
  2. sprinke

    sprinke Mu-43 All-Pro

    Apr 5, 2011
    Pasadena, CA
    I just did a test with my GH2, and it did the reverse. Without the flash, it chose ISO 320. With the flash, it chose ISO 160. Both cases the aperture and shutter speed were the same.
  3. pharaviel

    pharaviel Mu-43 Veteran

    Jun 20, 2011
    Reggio Emilia, Italy
    Daniele Frizzi
    Maybe the focus was on some distant object (more than 10 meters?) and the camera used an higher iso to extend the flash range?