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Thread: check for hot/dead pixel, here is the solution

  1. #1
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    Default check for hot/dead pixel, here is the solution


  2. #2
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    What is the accept number of hot and dead pixels?

    I have run the test for my 2040z at 1/10, 1, 2, 4, 6 s

    Threshold set at 60 hot pixel and 250 dead pixels (default)

    here are the results:


    Shutter Hot Dead
    1/10 0 0
    1 4 0
    2 4 0
    4 12 0
    6 22 0


    Is this acceptable?

  3. #3
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    Originally posted by volk
    What is the accept number of hot and dead pixels?

    I have run the test for my 2040z at 1/10, 1, 2, 4, 6 s

    Threshold set at 60 hot pixel and 250 dead pixels (default)

    here are the results:


    Shutter Hot Dead
    1/10 0 0
    1 4 0
    2 4 0
    4 12 0
    6 22 0


    Is this acceptable?
    U should get 0, 0 at 4 sec if possible.

    This is mine (after remapping + firmware upgrade):

    ISO 100, 7mm, F2.8, Auto WB, TIFF

    Shutter.....Hot (60) Dead (250)

    4...............0 0
    5...............0 0
    6...............0 0
    8...............2 0
    10.............7 0
    13.............16 0
    Last edited by Jayan; 22nd February 2002 at 11:58 PM.

  4. #4
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    Originally posted by Jayan


    U should get 0, 0 at 4 sec if possible.

    This is mine (after remapping + firmware upgrade):

    ISO 100, 7mm, F2.8, Auto WB, TIFF

    Shutter.....Hot (60) Dead (250)

    4...............0 0
    5...............0 0
    6...............0 0
    8...............2 0
    10.............7 0
    13.............16 0

    That mean I should take my DC for the firmware upgrade...
    will need to take timeoff to go after MArch (since linus say they not free)

    I hope to see other people's results here too...perhaps other DC's results...

  5. #5
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    Originally posted by volk
    What is the accept number of hot and dead pixels?
    Dead pixels should be 0.
    Check out my wildlife pics at www.instagram.com/conrad_nature

  6. #6
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    Originally posted by mpenza


    Dead pixels should be 0.
    Thanks Mpenza...

    Luckily mine is 0 for dead..

  7. #7
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    Here's my results:
    C700UZ Tiff:1600x1200 wb:auto ISO:100 f/4.0 5.9mm
    No dead pix! Whew

    Shutter~hotpix
    1/30~0
    1~0
    2~0
    3.2~0
    4~0
    5~4
    6~4
    8~25

    Suprised that the hot pix count shot up from 4@6s to 25@8s!

  8. #8
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    Originally posted by ark19
    Here's my results:
    C700UZ Tiff:1600x1200 wb:auto ISO:100 f/4.0 5.9mm
    No dead pix! Whew

    Shutter~hotpix
    1/30~0
    1~0
    2~0
    3.2~0
    4~0
    5~4
    6~4
    8~25

    Suprised that the hot pix count shot up from 4@6s to 25@8s!
    Urs quite good also leh!

    Most night shots u'll do at abt 3 to 4 sec anyway so u r pretty well covered here.

    The reason why the hot pixels shoot up so high from 6 to 8 sec maybe due to the CCD heating up.

  9. #9

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    is this a common problem of oly cameras?? don seem to see users complaining abt other brands

  10. #10
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    Originally posted by hong
    is this a common problem of oly cameras?? don seem to see users complaining abt other brands
    All brands also have what.....just that some has Noise Reduction function while others has a min shutter speed that's fast enuff to not develope any hot pixels.

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