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Thread: Moire problems with my GH1 and 20mm

  1. #1
    digi2ap is offline S.C. Regular
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    Moire problems with my GH1 and 20mm

    I'd like to know if anyone has successfully dealt with this in post production. The moire in the image in question covers a section of fine mesh fencing and includes false colour (alternating blue and orange) as well as shading. I've done some searches but any advice from the knowledgeable crowd here would be welcome.
    digi2ap
    Panasonic GH1 and GX1, Sigma DP1X and DP2X
    Blog - http://digi2ap.wordpress.com/

  2. #2
    Ernie is offline S.C. Rookie
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    Okay, let's start with the easiest options first. Are you sure your lens is not giving you some colour fringing? Do they show both in RAW and JPEG? What about with some other lens? Could be just a combination of both sensor and lens reaching their limit of performance in a given situation.
    Hard to say without any samples or further data.

  3. #3
    digi2ap is offline S.C. Regular
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    Fixed it having downloaded a trial version of LR4 and made use of the new moire removal brush. So pleased that I thought I would post the samples here. I think it was an unusual situation as I've not experienced the problem before.

    Name:  Snapz Pro XScreenSnapz002.jpg
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Size:  40.7 KBName:  Snapz Pro XScreenSnapz003.jpg
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    Thanked by Luckypenguin.
    digi2ap
    Panasonic GH1 and GX1, Sigma DP1X and DP2X
    Blog - http://digi2ap.wordpress.com/


  4. #4
    Luckypenguin's Avatar
    Luckypenguin is offline S.C. All-Pro Donor
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    Do you have a close-up crop of the uncorrected and corrected moire areas? I'd be intrigued to know what Lightroom is doing on a pixel level to remove the impression of moire.
    Nic (Canonite, Olympian, Panasonian, Samsunite) ~flickr~

  5. #5
    digi2ap is offline S.C. Regular
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    Those are 100% crops as the fence was quite a small detail within the whole. Not sure I can do any better than those crops above.
    digi2ap
    Panasonic GH1 and GX1, Sigma DP1X and DP2X
    Blog - http://digi2ap.wordpress.com/

  6. #6
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    Luckypenguin is offline S.C. All-Pro Donor
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    Ah, I see. Thanks! I wasn't sure if there was any more detail to see. In the worst area of moire LR has smudged things quite a bit but I guess that wouldn't be very noticable in the full-size image. It's also interesting that it hasn't touched the last piece of moire over the top of the railing, probably something to do with there being a non-uniform background.
    Nic (Canonite, Olympian, Panasonian, Samsunite) ~flickr~


  7. #7
    digi2ap is offline S.C. Regular
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    Don't discount that I may have done a heavy handed job on this as well as missed out working on one or two bits!
    digi2ap
    Panasonic GH1 and GX1, Sigma DP1X and DP2X
    Blog - http://digi2ap.wordpress.com/

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