Hot Pixels

So, having come across a post on Flickr about a gentleman who was having problems with excessive hot pixels on his new 5d mkII at long exposures I decided that it’d be a good idea to test my camera out a little more extensively to make sure I didn’t have the same problem. Turns out I did have the same problem.

The problem is most evident when taking long exposures. In the sample image above I shot with the lens cap on at f5.6, ISO 100 and 30 second RAW exposure. Now, this is the tricky part; do not use iPhoto or Lightroom to view the image because the noise reduction software kicks in and you wont see it. You need to use the DPP software that came bundled with the camera and view a 100% crop on the image and scan the full image for dots. Usually you’ll get a couple in varying colours; red, blue and green are the most popular.

Of course you can use the cameras built in Long Exposure Noise Reduction custom function under the Image setting. This doubles the time it takes for an exposure and tends to soften the image. Using the LENR you’ll not see any of these dots.

There is an unofficial fix floating around but it’s not a dead cert. This didn’t work for me.

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7 responses to “Canon 5d mkII Dead and Hot Pixels Issue”

  1. KJ says:

    I got a brand new body which is perfect. Seems like a few others are having the same issues.

  2. Matthew Marks says:

    i have the same problem on my new MK2. what did u end up doing? did canon help you?

  3. admin says:

    As it was under warranty I took it back to the store and got a new body. If you can do that, otherwise the Canon warranty process can be quite laborious.

  4. jamie says:

    Mine does exactly what your image shows. I bought mine through B&H in June and I’m shocked to see this probably already.
    I wonder if B&H will take it back?

  5. admin says:

    You need to do what I did. Take some example shots and go straight back to where you bought the camera from and show them. If you’ve still in the warranty period you’re entitled to ask for a replacement camera. Try not to go down the repair route as you’ll be without a camera for a few weeks.

  6. rocket says:

    Got a brand new 5D Mk2 and it had one very obvious hot pixel straight up out of the box. Canon Australia Customer Service explained it was not a gig deal, only one out of so many was not a defect. It would not be classed dead on arrival, I was required to send the camera in so Canon could map it out. The shop retailer wouldn’t chip in advancing an exchange. It will take some weeks and they prepared me that I wouldn’t see it back before X-mas, ie missing the whole summer holiday period here in Australia. Does basically look to me like possibly bad quality assurance, but it is definately bad customer service. I do not understand if it is sooooooo common, why the mapping software is not supplied as a user utility.

  7. The Professor says:

    Got this from T. Jason Wright Photography:

    Go to the 2nd yellow wrench icon menu and select sensor cleaning. Then click on “clean manually”. It flips the mirror up so you can access the sensor. But you don’t have to take the lens off or touch the sensor or anything like that. You just let it flip the mirror up for a full minute. Then turn off the camera and turn it back on… Then shoot again and see if your pixel is still stuck.

    – This worked like a charm for me!!!

    Good luck.

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