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Thread: What's this problem?

  1. #1
    Deregistered eejal's Avatar
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    Default What's this problem?

    I was trying to do some night photography, ISO:100, F11, 30secs.

    There seems to be a lot of white spots in the photos, especially when I zoomed in. can anyone advice me? I'm using a Tamron 17-50 f2.8 without filter.


  2. #2

    Default Re: What's this problem?

    HOT pixels.

    Should turn on Long Exp Noise Reduction especially exp 1" or longer...

    if its persistant...then you may like to get the sensor mapped at the camera's service center
    Last edited by anuar ahmad; 23rd April 2009 at 09:57 PM.

  3. #3

    Default Re: What's this problem?

    Long exposure hot pixels. Make sure to turn on long exposure NR on your S5Pro
    Alpha

  4. #4
    Deregistered eejal's Avatar
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    Default Re: What's this problem?

    Quote Originally Posted by anuar ahmad View Post
    HOT pixels.

    Should turn on Long Exp Noise Reduction especially exp 1" or longer...

    if its persistant...then you may like to get the sensor mapped at the camera's service center
    Quote Originally Posted by Rashkae View Post
    Long exposure hot pixels. Make sure to turn on long exposure NR on your S5Pro

    thanks for your replies guys.
    so what causes 'Hot Pixels'? anywhere i can do my own read up on online articles?

  5. #5

    Default Re: What's this problem?

    Quote Originally Posted by eejal View Post
    thanks for your replies guys.
    so what causes 'Hot Pixels'? anywhere i can do my own read up on online articles?
    Yeah. It's your sensor heating up due to long exposure, causing more noise in the signal being sent for processing.

    Google is your friend. Just search "what causes hot pixels"
    Alpha

  6. #6
    Deregistered eejal's Avatar
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    Default Re: What's this problem?

    Quote Originally Posted by Rashkae View Post
    Yeah. It's your sensor heating up due to long exposure, causing more noise in the signal being sent for processing.

    Google is your friend. Just search "what causes hot pixels"
    Rashkae.. thanks man!

    will google up and share my findings for the newbies..

  7. #7

    Default Re: What's this problem?

    I have seen this is one brand. Let the cam cool off, then try a 10 sec shot (manual mode) with lens cap on at iso100 and iso400. If you see those dots in same location, then it is a problem with the camera (not sure with component).

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