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Long exposure shots

  • BANNER25
    Participant

    I have a Cannon EOS 400D camera and would like to try taking some long nightime exposure shots i.e star trail shots. I have heard that there is a danger of overheating and damaging the sensor in the camera with taking shots with exposures of more than 1 hour. I would appreciate if anyone can advise me please on this

    thanks
    John

    darragh
    Participant

    John,

    I am unaware of any issues of heating in camera causing damage to the sensor.
    A lot of astronomy guys use DSLRs for long exposure work and have no issues regarding sensor damage.
    With long exposures, you will inevitably heat up the sensor which will cause noise, if you can find a way to keep the camera cool
    during your exposures, this will help to reduce noise.
    Some of astronomy guys modify webcams for long exposure work by attaching active cooling devices like a peltier cooler to keep the noise down.

    Regards
    Darragh

    MartinOC
    Participant

    John,

    There is also a custom function on the 400D to deal with noise on long exposures, check the details in the manual.
    I haven’t heard either about the sensor heating issue, beyond the noise problem.

    Martin

    Mark
    Keymaster

    Your battery running out will probably be the biggest issue you’ll face.

    You should also check out whatever Long Exposure setting(s) you have on the camera in order to reduce the Noise
    which you’ll probably notice as a result of the long exposure.

    slang61
    Participant

    I dont mean to hijack this thread – but does anyone know if you can do long exposures on the Nikon D60??

    bingbongbiddley
    Participant

    Slang61, yes you can do long exposures on a D60. I think you can possibly only do up to 30 minutes, as this is the case with the D50. You’ll need a remote release, unless you want to stand holding onto the shutter release button for half an hour.

    Oh, and you’ll get a lot of noise, but it’s fun anyway.

    121FOTO
    Participant

    What banner is talking about is the “hot pixel” problem which is indeed prone to happen at extremely long exposures.

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