Issue with Color noise @ 1000 Iso Canon 5D MarkII, 50mm f1.4, jpg.

Discussion in 'Beyond the Basics' started by elrafo, Jan 18, 2009.

  1. elrafo

    elrafo TPF Noob!

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    Hello there,


    Here is a sample of a picture I did this WE, I have updated the Firmware of the camera to the 1.0.0.7 because I heard about some bending problems on the 5D.

    It was shooten in JPG Large size, If you look on the background, on the dark Out of focus part of the picture, you can see clearly a strange noise problem with greens, and reds colors. I am not found of that , particularly for a 3,000$ camera...Is is normal??

    here is a crop:
    [​IMG]

    and full resolution:
    http://raphael.lacoste.free.fr/thephotoforum/IMG_7097.JPG

    Are there some Canon users down here? do you think it is a normal issue with this condition of lighting ?


    thanks!
     
    Last edited: Jan 19, 2009
  2. elrafo

    elrafo TPF Noob!

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    oh a detail, there was a negative exposure bias value, do you think it can play a role there ?
     
  3. schumionbike

    schumionbike TPF Noob!

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    Yeah, you want to overexpose when you're shooting high ISO, it'll cut down on the noise.
     
  4. elrafo

    elrafo TPF Noob!

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    oh thanks,

    but do you know if there was earlier versions of the 5D that had troubles with high iso? was is only a firmware issue or hardware? I am affraid now to have a bad model :(
     
  5. schumionbike

    schumionbike TPF Noob!

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    I never shot on a 5D before so I don't know. But I can tell you that sometime my picture at 1600 ISO is cleaner that a shot a 800 ISO just because I underexpose badly at 8000 like by a stop or so but then again, I don't know anything about the 5D.
     
  6. tsaraleksi

    tsaraleksi TPF Noob!

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    If you have no noise reduction turned on, that's probably what it looks like.
     
  7. elrafo

    elrafo TPF Noob!

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    Hey,

    I had Standard NR I think... it is not enough ?

    while playing with Digital Photo professional I found nice results with chroma NR, still, I don't like much this noise, maybe it is a normal issue but it looks like I miss some tones to blend close colors together.
     
  8. Ptyler22

    Ptyler22 TPF Noob!

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    I think in a crop that big, that's about how much noise you should expect. I mean when are you going to need to use the pictures at that size? Probably only when editing them and looking for noise. That's less noise than my 40d has at ISO 400!
    P.S. I realized my post sounds nasty, but it's not supposed to be, I mean I do the same thing. I look at the pictures big, and then see the noise and freak out trying to get rid of it, but then I realize that you can't even see it unless I am viewing the pictures at like 100%. Oh and I also agree with slightly over exposing Jpegs so that the shadows don't have quite so much noise.
     
  9. RyanLilly

    RyanLilly No longer a newbie, moving up!

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    I'll bet there is significantly less noise if you shoot raw, but I haven't seen any side by side comparisons.It's probably worth looking into though.
     
  10. Big Mike

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

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    That is actually a small amount of noise and it will not turn up in a print less than 3 feet wide. You are pixel peeping, so don't do that ;)

    Also, Expose Right
     
  11. elrafo

    elrafo TPF Noob!

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    oki oki I am too picky ;)
    but I thought the 5D would do better a 1000 iso!
     
  12. Big Mike

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

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    Have you compared it to any other cameras in that ISO range? I think you will find that this is pretty clean.
     

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