Noob ? about file size.

Discussion in 'Digital Discussion & Q&A' started by trades2cash, Feb 5, 2009.

  1. trades2cash

    trades2cash TPF Noob!

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    I have a nikon d90 12.3 mega pixels camera. I have the save settings set to the highest quality RAW. But most of the pictures i have taken are between 9megs and 10megs. I dont understand, should'nt they be larger because it is a 12.3 meg camera or am i missing something. I have also noticed when i view the pictures in the View NX software that came with the camera, The picture info on the left side of the screen says Image Quality compressed RAW. I thought RAW was an uncompressed format. Could someone please enlighten me on this. Thanks.....signed Randall
     
  2. EOS_JD

    EOS_JD TPF Noob!

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    Megapixels do not equal megabytes
     
  3. andrew99

    andrew99 TPF Noob!

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    The RAW files can be compressed without losing any data, which is different than JPEG compression, which does lose data. This is why compressed RAW files are still much bigger than JPEG's. RAW compression is kind of like zip, where you can reduce the size of programs without corrupting them.
     
  4. trades2cash

    trades2cash TPF Noob!

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    Thanks for the info guys. I am a total noob who is trying to improve and learn everyday. signed.... Randall
     
  5. Garbz

    Garbz No longer a newbie, moving up!

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    Indeed your uncompressed RAW file would be 12.3mpx*12bpp/8bpB = 18.45 megabytes.
     

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