WB in LR3 raw vs jpeg

Discussion in 'Photography Beginners' Forum' started by Ricky21, Mar 13, 2012.

  1. Ricky21

    Ricky21 TPF Noob!

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    I know that if shooting raw the white balance is set during post processing. (I use LR3). I have uploaded jpegs and when I do I usually choose to set auto wb instead of as shot and it looks way better.

    So, what is the difference between this and setting wb for raw? Is it the fact that you can change it in post processing to mirror the different options on the camera?


     
  2. jonathon94

    jonathon94 TPF Noob!

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    I'm slightly curious about this as well
     
  3. KmH

    KmH In memoriam Supporting Member

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    Raw files are mostly unedited. Post process you can set the white balance of the Raw file very accurately. Particularly if you had a white balance target in one of the photos made in the same light. That's one use of a gray card.
    Whatever white balance (or color space, saturation, contrast, sharpening, camera settings) the camera is set to isn't directly applied to a Raw file.

    A JPEG has had the conrast, sharpening and saturation all globally edited. Raw files can be locally edited. JPEG files can have local edits applied on top of the edits the camera does, but the Raw files have a 16-bit color depth (16,384 gradations of tone per color channel) while JPEGs are limited to an 8-bit color depth (256 gradations of tone per color channel)


    Not all cameas do auto white balance well, and the white balance can only fully correct for 1 light source temperature.
     
  4. KmH

    KmH In memoriam Supporting Member

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    I thought you said it only takes you 10-30 minutes to know how to use a technology. ;)
     
  5. Big Mike

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

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    Why Raw -- Part I

    I'd recommend reading that whole article (three parts). It's a bit technical at times, but it does a good job of explaining the differences of RAW vs JPEG.
     
  6. MReid

    MReid TPF Noob!

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    In Lightroom it is easy to adjust white balance for jpegs and also raws.
     
  7. Big Mike

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

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    :scratch:
     
  8. MReid

    MReid TPF Noob!

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    Why the head scratch, I do it all the time no problems.
     
  9. fokker

    fokker No longer a newbie, moving up!

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    That's true I do too, though I think the WB edit for jpegs is more of a psuedo-adjustment, i.e. fudging it to make it look right rather than the raw editor which is able to set it accurately based on having complete pixel data. Or at least that's my understanding.
     
  10. Big Mike

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

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    The controls are the same, but the affect on the quality of the image is different. Granted, it might not always be something you can easily discern...but it's a quality degradation to make that adjustment to a JPEG file, much more so than with a raw file.
     
  11. MReid

    MReid TPF Noob!

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    Not going to argue minute pixel to pixel info. that can't be seen.

    I have a jpeg and I have a raw.
    I use the eyedropper...click on something white or something with three values in the 60's....if necessary adjust the slider to taste.
    Same effect on them both.

    Just relaying my own personal experience with both formats.
     
  12. Ricky21

    Ricky21 TPF Noob!

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    This is the exact answer I think I was looking for. Thanks mike
     

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