Is It Normal

Discussion in 'Digital Discussion & Q&A' started by Al-Wazeer, Jan 29, 2009.

  1. Al-Wazeer

    Al-Wazeer TPF Noob!

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    hello
    when i take - with my Nikon D40 - shots with slow shutter speeds my camera takes a loong time at saving the picture.

    i used a canon 350d and took shots with slow shutter speeds and it saved it just in one sec maybe!

    is there a problem with my d40 or maybe my card is bad quality so it needs a lot of time to save a long exposed picture, or that's normal for my camera?? ( i use an SD lexar 2GB memo )
     
  2. Slaphead

    Slaphead TPF Noob!

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    Just a guess, but I think you've got the "Long Exposure Noise Reduction" turned on. If memory serves correctly this mode can seriously slow down writing to the card while the camera processes the noise.
     
  3. Captain IK

    Captain IK TPF Noob!

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    Slaphead is likely correct.
     
  4. Al-Wazeer

    Al-Wazeer TPF Noob!

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    yes i do turn on the noise reduction ...
    so that's it? no problem with camera ??
    or should i check to close the noise reduction, and take a long exposed picture?

    because in short exposed pic it saves it realy quick no problem! even with the noise reduction on
     
  5. Slaphead

    Slaphead TPF Noob!

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    Ok, just checked the D40 manual and the answer is yes, turn off noise reduction when doing a long exposure (1 second or longer) and the write speed will go back to normal, but the resulting images may be noisier than you'd like.
     
  6. andrew99

    andrew99 TPF Noob!

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    When you have the long exposure noise reduction turned on, the camera takes 2 exposures. First the real exposure, then it takes another one with the shutter closed but for the same duration. The second exposure is just so the camera has a reference point of which pixels are causing noise, and then subtracts that from the original image. You can test this -- if you take a long exposure, the camera will be frozen for exactly the same amount of time while it does the reference exposure.

    Personally I turned off that feature when I was using a D40, it used to drive me nuts.
     

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