noisy image?

Discussion in 'Beyond the Basics' started by jimaroo, May 31, 2006.

  1. jimaroo

    jimaroo TPF Noob!

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    i don't understand what a noisy image is. does it have anything to do with the mirror shake, or anything like that?

    if anyone can help that would be greate
    thanks
     
  2. DepthAfield

    DepthAfield TPF Noob!

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    If your question is in reference to digital imagesÂ… Consider this:

    When you crank up the ISO on your digital camera, you are essentially boosting the sensitivity of the sensor. Much the same as boosting the volume of your home/car stereo when a good tune is playedÂ… With that increased volume comes some drawbacks, namely: clipping/distortion. The same applies to digital cameras. Crank up the ISO and you must deal with over-amplification. In your car, this phenomenon is heard as muddied sound. From your camera, it is seen as the noise you are experiencing.
     
  3. jimaroo

    jimaroo TPF Noob!

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    oh that helps, thanks, but does that mean its a lot better to shoot with 200 iso over 400? will it make the picture more clear?
     
  4. Arch

    Arch Damn You! Staff Member Supporting Member

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    yes..... put simply, the higher the iso the more noise will be produced.
     
  5. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Ideally, you want to shoot at the lowest ISO that you can. The exception being when you actually want the noise.

    An example of when you would turn up the ISO when you need a faster shutter speed and your aperture is already open to the max.
     
  6. thebeginning

    thebeginning TPF Noob!

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    [​IMG]

    ^that's what a noisy image is :)

    for reference, that was shot at ISO 6400 on a d100 i believe.
     

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