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Olympus E-PL1 Auto Iso vs. manual Iso

Discussion in 'Olympus Cameras' started by ronyzmbow, May 13, 2012.

  1. ronyzmbow

    ronyzmbow Mu-43 Rookie

    Dec 12, 2011
    I am still new to my Olympus E-PL1 - so bare with me...
    The default of Olympus E-PL1 Auto Iso starts with 200 Iso - the manual starts with 100 Iso. I can recall that some say the 200 Iso has a better Dynamic Range.
    I have tried to compare the two option outdoors in a clear bright sunny day, and it seems as the 200 Iso images are more grainy and "dirty" look over all the image, mainly in darker areas of the image, while the 100 Iso images and cleaner. Other than this I did not notice any differences.
    Any idea why and comments?
  2. songs2001

    songs2001 Mu-43 Top Veteran

    Jul 8, 2011
    Your darker areas are underexposed when at ISO 200.

    ISO 100 on the Olympus, over exposes, and then pulls highlights which is why there is less dynamic range, but also means the shadow areas will have less noise.

    If you want to use ISO 100 in auto ISO. You can set your auto ISO, set universal exposure to +1 and then recover the highlights in raw.

    You'll blow more highlights that way and get reduced dynamic range but you'll reduce shadow noise.
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