Noise in black and white

Discussion in 'Photography Beginners' Forum' started by Fox Paw, Jun 21, 2008.

  1. Fox Paw

    Fox Paw TPF Noob!

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    When I convert an outdoor shot to black and white using channel mixer, I often get a lot of noise in the sky. This seems to happen most with early morning or dusk shots. It's there before I start tweaking the channels. Am I doing something wrong?
     
  2. elemental

    elemental TPF Noob!

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    Are you shooting RAW or jpeg?

    It seems that I have this problem when I try to "push" one channel too far- minor adjustments are okay, but past a certain threshold quality starts to degrade rapidly. I found it seemed better in RAW.

    Don't forget that what is undesirable "noise" in color can turn to desirable "grain" in black and white. I sometimes shoot higher ISO than I would ever use for color (past 800 is completely unusable on my camera) when I'm planning on final output in black and white because I know it can be a pleasing effect.
     
  3. Fox Paw

    Fox Paw TPF Noob!

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    Thanks for the response. I'm shooting in RAW now, but I had the same issue when I was shooting in jpeg. I know what you mean about pushing the channels too far but I get this at standard levels. Not a huge issue...maybe it's unavoidable.
     
  4. ANDS!

    ANDS! No longer a newbie, moving up!

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    Post an example: color and b&w.
     
  5. Fox Paw

    Fox Paw TPF Noob!

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    It shows up here, although it's less apparent after Photobucket compresses the image.

    [​IMG]

    [​IMG]
     
  6. djrichie28

    djrichie28 TPF Noob!

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    I don't have a solution to the problem, but can shed some insight to the noise removal. The noise removal filter works well on skys since you can use maximum strenght and not preserve the details since sky has very little detail from sharp edges anyways.
     

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