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Black point in sun, why?

  1. Sep 28, 2006 #1
    Why? It's a optic effect? It's taken with digital camera.

    [​IMG]

    [​IMG]

    :bugeye:
     
  2. jcsd
  3. Sep 28, 2006 #2
    Well it is certanly not an accurate picture of the sun. :smile:

    Perhaps some faulty red eye detection mechanism.
     
  4. Sep 28, 2006 #3
    Just a guess, but maybe the sensors on that part of the CCD are "off" (to protect the chip from possible damage from the high intensity sunlight)?

    -GeoMike-
     
    Last edited: Sep 28, 2006
  5. Sep 28, 2006 #4
    Someone else recently posted similar pictures... Probably due to the high intensity of the sun.
     
  6. Sep 29, 2006 #5
    Have you observed that in each photography also is a white point?
     
    Last edited: Sep 29, 2006
  7. Sep 29, 2006 #6

    ZapperZ

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    If you read the instructions on your digital camera carefully, it will clearly indicate that you should never point the camera directly at the sun. You may have destroyed several of your CCD sensors.

    Zz.
     
  8. Sep 29, 2006 #7
    But when I don't take pictures to sun, don't appear black points.
     
  9. Sep 29, 2006 #8

    DaveC426913

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    This is typical. The CCD detectors are simply overloaded.
     
  10. Sep 29, 2006 #9
    That's interesting
     
  11. Sep 29, 2006 #10

    chroot

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    Not really. It's just an reflection off some internal lens element.

    The reason the black spots appears is because some kind of anti-blooming circuitry is kicking in for the severely over-exposed pixels. I'm no CCD expert, but I suspect there's a diode connected to each pixel well, and, when the charge in a well gets too large, it's completely dumped to ground, leaving the pixel black.

    - Warren
     
  12. Sep 29, 2006 #11
    looks like a black circle made by the windows painter.

    btw, there are two circles in each pic
     
  13. Sep 29, 2006 #12
    Theres a little black spot on sun today...The Police
    {thats my soul up there}
     
  14. Sep 29, 2006 #13

    russ_watters

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    Well, then consider yourself lucky and don't do it again...
     
  15. Sep 29, 2006 #14

    DaveC426913

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    That is interesting. Thouigh I think chroot has hit the nail on the head.
     
  16. Sep 29, 2006 #15

    chroot

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    The white spot, as I said, is just an internal reflection off one of the camera's lenses. Note how it's always directly opposite the optical axis (center of the picture) from the Sun itself.

    - Warren
     
  17. Sep 29, 2006 #16

    DaveC426913

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    Which is what I mean by 'hitting the nail'... i.e. a classic lens reflection.
     
  18. Sep 29, 2006 #17

    chroot

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    Oh, heh, I misunderstood your response. Leave it to me to hit the nail on the head, and then promptly lose the hammer.

    - Warren
     
  19. Sep 29, 2006 #18

    DaveC426913

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    Heeeeaaaads uuuuuuup! :eek: :eek: :eek: :eek:


    *Thunk*
     
  20. Sep 29, 2006 #19

    Moonbear

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    :rofl: I need to remember that line; I think it'll come in useful. :biggrin:
     
  21. Sep 30, 2006 #20
    I'm almost positive you'll find several situations daily to use it.

    and to hypatia. good one. at least someone is paying attention.
     
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