Dead Pixel?

Discussion in 'Digital Photography' started by miloblithe, May 11, 2007.

  1. miloblithe macrumors 68020

    miloblithe

    Joined:
    Nov 14, 2003
    Location:
    Washington, DC
    #1
    Is this a dead pixel on the sensor? It's in the same place in all my recent photos. Or is it dust?

    What can I do at this point? (Canon XTi)

    Edit: other, I mean, than ignore it because it's insignificant.
     

    Attached Files:

  2. robbieduncan Moderator emeritus

    robbieduncan

    Joined:
    Jul 24, 2002
    Location:
    London
  3. andiwm2003 macrumors 601

    andiwm2003

    Joined:
    Mar 29, 2004
    Location:
    Boston, MA
    #3
    i'm not sure about this now. i have some faint memory that i heard that cameras check automatically for hot pixels on the chip and map them out. you just have to trigger the process. i thought on the sony it's done every few hours or so automatically. maybe a website or tech manual can give you information how to reset the camera.

    sorry, i don't remember much more than that. try dpreview.com
     
  4. miloblithe thread starter macrumors 68020

    miloblithe

    Joined:
    Nov 14, 2003
    Location:
    Washington, DC
    #4
    Thanks for the suggestion!

    Here's what I found (just in case it helps anyone else):

    Seems to have done the trick, although at ISO 1600 there are a number of little dark gray dots, including, I think, in the place where this one was (at ISO 200 in actual pictures). Still, a vast improvement.
     
  5. robbieduncan Moderator emeritus

    robbieduncan

    Joined:
    Jul 24, 2002
    Location:
    London
    #5
    Awesome! I'd expect to see some anomalies at ISO1600. It's reasonably noisy on the 400D (for an SLR, it's mile ahead of a P&S). Those grey dots are not an issue with the sensor: they are probably being caused by some very minor fluctuations in the amps.
     
  6. Crawn2003 macrumors 6502

    Joined:
    Jul 8, 2005
    Location:
    Santa Rosa, California
    #6
    A long, long, long time ago I had a P&S Olympus. I think it was like a 1.3 megapixel camera, and I had this exact problem! Blue and red pixels showing up in the photographs. I called Olympus and they said it was probably a problem with the sensor, dead pixel or what not, so I sent it back to them and they sent me a new one (I want to say) overnight.

    ~Crawn
     

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