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Thread: Help with single colored pixel

  1. #1

    Default Help with single colored pixel

    Hi guys,

    can help me with this. Theres a purple color pixel at the MBS area. What is that?
    also i noticed there are such colored pixel on my other photos as well but at different spot.
    Theres one even better. its a grey bubble thing which im not sure what it is.


  2. #2

    Default Re: Help with single colored pixel

    It's called a hot pixel. Send your camera for remapping.
    Alpha

  3. #3

    Default Re: Help with single colored pixel

    Quote Originally Posted by Rashkae View Post
    It's called a hot pixel. Send your camera for remapping.
    oh ok thanks Rashkae! Is it suppose to appear on every photo or will it be random photo random spots?
    i seem to have some other photos with different kind of pixel after going through them last night. not even sure if its pixel because it tried to see it on a out of focus picture and its like a bubble that appeared from nowhere.
    previously i posted for help where on the dark areas of the picture, it was very very color pixelated when when my iso was at 100. I brush it off as problem "fixed" because there wasnt any after i took some photos on my next trip.

    Ill send my camera in for remapping but just curious how does this hot pixel come about? How do i avoid it?
    Last edited by t3hkor; 19th June 2012 at 09:28 AM.

  4. #4

    Default

    Just google hot pixel. It's a technical thing. Even if you remap, I believe it alleviates but not solve the problem. Just spot heal unwanted hot pixels off with PS.

  5. #5

    Default

    Btw to avoid the problem, I guess use low iso, do less long exposures.....let your camera "rest" which also means don't be too trigger happy. But for myself, I won't care. Just PS it

  6. #6

    Default

    I got it twice. Didnt send for remap ever since. I usually ignore it because it's only a pixel out of millions. Yours quite severe, mine only small tiny dot which is barely visible even when 100% zoomed.
    Last edited by Sgdevilzz; 25th June 2012 at 05:00 AM.

  7. #7

    Default Re: Help with single colored pixel

    Quote Originally Posted by Yangzw View Post
    Btw to avoid the problem, I guess use low iso, do less long exposures.....let your camera "rest" which also means don't be too trigger happy. But for myself, I won't care. Just PS it
    the prob is.... my iso is set at 100 for the above pic and not very slow shutter speed. This photo is already not so bad. there were some others that had it ALL over the dark areas on long exposure at iso100 also!

  8. #8

    Default Re: Help with single colored pixel

    Quote Originally Posted by t3hkor View Post
    the prob is.... my iso is set at 100 for the above pic and not very slow shutter speed. This photo is already not so bad. there were some others that had it ALL over the dark areas on long exposure at iso100 also!
    The point is....its a not a problem you can choose to avoid/ eliminate.

  9. #9

    Default Re: Help with single colored pixel

    Rashkae, or anyone else for that matter, will remapping help if there are quite a number of these "hot pixels"? I have a 7D that under exposures of around 15sec ++ will generate quite a number of hot pixels (especially for night sky). The number of these hot pixels are like 20 I believe.
    EOS 7D, EOS 450D | 10-22, 17-55, 70-200 F4 IS | YN465, YN560 II
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