Fuji S5100/5500 baaaaaaad vignetting

Discussion in 'Fuji' started by colin., Jul 4, 2005.

  1. colin.

    colin. Guest

    I am getting really, really bad purple vignetting between areas of extreme
    white and anything darker when I take photos with my newly-acquired Finepix
    S5500. Does anyone know how to combat this, or reduce it?

    Many thanks

    Colin
     
    colin., Jul 4, 2005
    #1
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  2. colin.

    Paul Heslop Guest


    I've only recently found a way of clearing it off your pic after some
    time using a digi cam. This was from an onling guide and it works. I
    finally cleaned up some images which had been bugging me for ages

    "the Hue/Saturation/Lightness (HSL) tool.

    Instructions for using HSL to remove purple fringing will vary
    slightly between programs, but they all follow the same basic process.
    Start by loading up your affected image. Now go to the HSL tool. In
    Photoshop, select Image-Adjustments-Hue/Saturation… In Photoshop
    Elements 2, select Enhance-Adjust Color-Hue Saturation… and in Paint
    Shop Pro 8 Adjust-Hue & Saturation-Hue/Saturation/Lightness.

    Here is the important step: click the blue channel. Do not adjust the
    master channel. Now adjust the saturation slider to around 80 per cent
    (you can fine-tune this later).

    If you are using Paint Shop Pro 8, move the colour wheel slowly around
    and watch the preview window. When you hit the right spot, the purple
    will vanish. Fine-tune the slider for maximum effect and click OK. If
    there are still traces of purple, repeat the process until you find
    the other tone.

    The Adobe products take guesswork out of the HSL adjustment step. When
    the blue channel is selected, the eye dropper tool will become
    available. Click the eyedropper on the left and use it to sample the
    purple fringe in your image. You can use the colour slider at the
    bottom to make finer adjustments (tip: you can also use the + and -
    keys to zoom in and out of the image while the HSL window is still
    open).

    Finally, you may find the image needs some minor tinkering and will
    probably appear a little washed out. Making fine adjustments to the
    Brightness/Contrast or Levels settings will correct these problems"
     
    Paul Heslop, Jul 4, 2005
    #2
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  3. colin.

    colin. Guest

    Awesome, thanks very much.
     
    colin., Jul 4, 2005
    #3
  4. colin.

    Paul Heslop Guest

    you're welcome, just be gentle with it and don't save til you're sure
    :O)
     
    Paul Heslop, Jul 4, 2005
    #4
  5. colin.

    yowie Guest

    I've noticed the same thing on a couple of shots taken with the same type
    of camera (I believe the effect is called 'blooming').
    It happens when a grossly overexposed highlight borders a very dark area.
    It's the result of exceeding the dynamic range of the sensor and not a
    shortcoming of the lens.

    To reduce it, all you can do is carefully control the exposure, AFAIK.

    I don't know if the S5500 is particularly prone to this and would also be
    interested in any informed opinions.
     
    yowie, Jul 5, 2005
    #5
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