Lumix FZ20 corner blur samples

Discussion in 'Panasonic Lumix' started by Alturas, Oct 5, 2005.

  1. Alturas

    Alturas Guest

    Below are two FZ20 examples of lower right corner blur with basic EXIF
    info. These are crops of only the bottom 300 pixels due to space
    limitations. The blur is not predictable but the lower right is
    usually somewhat softer than the lower left in half my photos. In
    these landscapes, the focal point is many yards away from the
    foreground but depth of field keeps the foreground relatively sharp.
    It almost looks like motion blur to me, which makes the OIS element a
    suspect.

    If anyone owning an FZ20 or other 12X Lumix reads this, can you tell
    me if you get intermittent/variable blurring in one corner only? And
    have you learned the cause of it? Zooming in and/or stopping down the
    lens helps a lot in some cases, but why would only one corner be soft?

    http://www.villagephotos.com/pubbrowse.asp?folder_id=1475570

    FZ20 crop 1 (meadow grass)
    ExposureTime - 1/500 seconds
    FNumber - 4.60
    ISOSpeedRatings - 80
    FocalLength - 15.60 mm
    FocalLengthIn35mmFilm - 94 mm
    Contrast - Normal
    Saturation - Normal
    Sharpness - Normal

    FZ20 crop 2 (small pine trees)
    ExposureTime - 1/400 seconds
    FNumber - 4.00
    ISOSpeedRatings - 80
    FocalLength - 11.90 mm
    FocalLengthIn35mmFilm - 71 mm
    Contrast - Normal
    Saturation - Normal
    Sharpness - Normal


    Alturas

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    Alturas, Oct 5, 2005
    #1
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  2. I've had a FZ20 for almost a year, and have never experienced corner
    blurring.

    What drives me nuts is a completely gray screen when I try to take photos
    either in the fog, or under a dark overcast day. Is this the result of just
    not enough light?

    Bob
     
    Robert Millard, Oct 5, 2005
    #2
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  3. Alturas

    Neil Ellwood Guest

    On Wed, 05 Oct 2005 13:29:54 -0700, Alturas wrote:

    >
    > If anyone owning an FZ20 or other 12X Lumix reads this, can you tell
    > me if you get intermittent/variable blurring in one corner only? And
    > have you learned the cause of it? Zooming in and/or stopping down the
    > lens helps a lot in some cases, but why would only one corner be soft?
    >
    > http://www.villagephotos.com/pubbrowse.asp?folder_id=1475570

    Could be lens misalignment
    --
    Neil
    Delete delete to reply by email
     
    Neil Ellwood, Oct 6, 2005
    #3
  4. Alturas

    Alturas Guest

    On Thu, 6 Oct 2005 05:58:19 +0000 (UTC), Neil Ellwood
    <> wrote:

    >On Wed, 05 Oct 2005 13:29:54 -0700, Alturas wrote:
    >
    >>
    >> If anyone owning an FZ20 or other 12X Lumix reads this, can you tell
    >> me if you get intermittent/variable blurring in one corner only? And
    >> have you learned the cause of it? Zooming in and/or stopping down the
    >> lens helps a lot in some cases, but why would only one corner be soft?
    >>
    >> http://www.villagephotos.com/pubbrowse.asp?folder_id=1475570

    >Could be lens misalignment


    I just don''t know. It's not consistent. Sending the camera in for
    repair would probably cause some other problem. Maybe I'll just do
    some image sharpening in that one corner for keeper shots.

    Alturas

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    Alturas, Oct 6, 2005
    #4
  5. Alturas

    Ed Ruf Guest

    On Fri, 07 Oct 2005 19:12:16 +0100, in rec.photo.digital Les
    <> wrote:


    >Could it be the image stabilization system*, I wonder. If you move or
    >the vegetation moves, some lens components try to compensate. I guess
    >that sometimes the compensation goes haywire and this could explain
    >the inconsistency.
    >
    >* http://panasonic.co.jp/pavc/global/lumix/fx8/megaois_leica.html


    If you read the page you posted the link to you will see the correction is
    gyro based so movement of the vegetation should have no effect on the
    correction itself. Subject motion might be a cause of the blur, though for
    a 1/500sec you might think it would be hard to notice. Now if the motion
    was opposite the direction of the hand movement, then of course it would be
    worsened.
    ----------
    Ed Ruf Lifetime AMA# 344007 ()
    See images taken with my CP-990/5700 & D70 at
    http://edwardgruf.com/Digital_Photography/General/index.html
     
    Ed Ruf, Oct 7, 2005
    #5
  6. Alturas

    Alturas Guest

    On Fri, 07 Oct 2005 16:26:00 -0400, Ed Ruf <>
    wrote:

    >On Fri, 07 Oct 2005 19:12:16 +0100, in rec.photo.digital Les
    ><> wrote:
    >
    >
    >>Could it be the image stabilization system*, I wonder. If you move or
    >>the vegetation moves, some lens components try to compensate. I guess
    >>that sometimes the compensation goes haywire and this could explain
    >>the inconsistency.
    >>
    >>* http://panasonic.co.jp/pavc/global/lumix/fx8/megaois_leica.html

    >
    >If you read the page you posted the link to you will see the correction is
    >gyro based so movement of the vegetation should have no effect on the
    >correction itself. Subject motion might be a cause of the blur, though for
    >a 1/500sec you might think it would be hard to notice. Now if the motion
    >was opposite the direction of the hand movement, then of course it would be
    >worsened.


    There was really no wind to speak of in my sample shots, and you'd
    have seen blur elsewhere if it was just that. It's too consistent in
    the lower right to have anything to do with the subject. Also, in most
    of the shots the focal point was many yards in the distance. It
    happens much less when the foreground is the focal plane.

    I do suspect some interaction between the OIS element and other lens
    elements. Maybe a combining of two flaws adds up to a larger one when
    they line up just right. All speculation.

    Alturas

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    Alturas, Oct 10, 2005
    #6
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