weird artefacts- possible lens flare?

Discussion in 'Beyond the Basics' started by w.pasman, Feb 25, 2007.

  1. w.pasman

    w.pasman TPF Noob!

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    A relative of mine encountered this weird artefacts in her photos.
    Below a large part of the upper half of the photo (original was 4MPixel, it's a not-too-new point&shoot olympus camera).
    There is one large disk, surrounded by three very small. Right top is another one. In the window is another one, and a bit lower (just outside this crop) in the window is a "duplicate" of the large disk.
    Is it possible that this is lens flare??

    [​IMG]

    I did some filtering (photoshop) on the large disk, giving the following:

    [​IMG]

    Note that it is perfectly round and I don't see any other artefacts as lines, which would be commonly encountered with this kind of bright lens flare, if it is lens flare.

    All lights in the room were dimmed, only the flash was a bright light source.
     
  2. fmw

    fmw No longer a newbie, moving up!

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    It is either a miniature Martian space craft or a new parasitic amoeba. ;)

    Sorry, I don't know what it is. To be a ghost image there would have to be a light source there.
     
  3. Sw1tchFX

    Sw1tchFX TPF Noob!

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    yeah, that's REALLY wierd. When was the last time you cleaned your lens?
     
  4. hazzayoungn

    hazzayoungn TPF Noob!

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    ghosts in limbo

    haunting the house
     
  5. Garbz

    Garbz No longer a newbie, moving up!

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    Looks like one of 2 things, either a drop of water on the lens, or some fungus growing on one of the elements. Either way it is definitely dirty lens. If it were smoke in the room then you would be seeing more smaller ones, not just one big one and a few tiny ones.
     
  6. Hertz van Rental

    Hertz van Rental TPF Noob!

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    There are a couple more smaller artifacts in that image too by the look of things.
    Is it film or digital?
    Is that the whole image or just a section? If it's only a section can you post the whole thing?
    There are a number of things that can produce weird marks on an image with film. I am discovering that there are a lot more with digital.
    If you can answer my questions I'll give it my best shot.
     
  7. Peanuts

    Peanuts TPF Noob!

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    I can't remember where I read it, but apparently water particles and the likes in the air will reflect the light from light and result in this little artifacts. Truth? I don't know.
     
  8. w.pasman

    w.pasman TPF Noob!

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    Thanks for the feedback, I'm really puzzled by this one...

    This is not my own photo, I will ask for permission to post the whole photo.

    This is digital, olympus 4MPix point&shoot, but I'm not entirely sure which model (xif info gives me three models...). I will ask again for that info.

    It's about 60% of the top half of the original. It is at original dpi so not downscaled.
     
  9. w.pasman

    w.pasman TPF Noob!

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    I did not think of that yet.
    I can imagine water to create a light spot but I fail to see how a drop of water could create concentric circles and 12-fold symmetry (notice the tiny spots at 12, 1, 2 and 3 o'clock around the large disk)

    I found a few photos of someone having a droplet developing on his lens http://www3.gettysburg.edu/~marschal/clea/condensation.html
    but this looks just like a drop, not at all like the artefacts in my images.
     
  10. Alex_B

    Alex_B No longer a newbie, moving up!

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    whatever it is , I can see at least 10 spots of varying sizes which look almost identical to the very prominent one scattered all over the image.

    I never saw anything similar in any of my own images, be it film or digital.
     
  11. Alex_B

    Alex_B No longer a newbie, moving up!

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    hmm, i might remember from my microscopy days that water in between to glass plates can sometimes make funny fatterns similar to this
     
  12. w.pasman

    w.pasman TPF Noob!

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    OK I got permissions to publish the originals :)

    Here they are:

    [​IMG]

    Here is the photo taken right(19 seconds) before it:

    [​IMG]
     

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