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Thread: Correcting CA/Colour Fringing .. ??

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    Correcting CA/Colour Fringing .. ??

    Ive got a few shots which are showing very obvious CA / cyan colour fringing. Can anyone help me with a way to correct it .. I dont have PS , am using GIMP.

    Cheers guys .. hope theres a way casue its really quite obvious
    Hi Im Darren

    www.darrengrayphotography.com

    SONY A850 (FF)] + GRIP | SONY A350 (APS-C) + GRIP | SONY NEX-5 +16 2.8 + 18-55 E-MOUNT LENSES | CZ 85 1.4 | 50 1.4 | 28-75 2.8 | 70-200 2.8 | 2 x 42AMs | 24" imac | LR | CS4 | + loads of other junk


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    Give this a try, I installed it a while ago but have not had any need for it as yet

    http://www.farcrydesign.com/GIMP/PurpleFringe.html

    Cheers David
    c&c always welcome, both good and bad, provided it is constructive.
    Feel free to edit my images (hopefully for the better).
    Nikon D40x, SB600, 18~55 & 55~200 kit lenses, Sigma 105 Macro and an understanding wife

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    Administrator ricktas's Avatar
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    Photoshop has a lens correction filter, not sure about Gimp, but maybe have a look and see if you have an equivalent filter?
    "It is one thing to make a picture of what a person looks like, it is another thing to make a portrait of who they are" - Paul Caponigro

    Constructive Critique of my photographs is always appreciated
    Nikon, etc!

    RICK
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    Quote Originally Posted by pommie View Post
    Give this a try, I installed it a while ago but have not had any need for it as yet

    http://www.farcrydesign.com/GIMP/PurpleFringe.html

    Cheers David
    thanks mate .. ill give that a go.

    and thanks Rick as well .. ill try pommies link, it seems to be GIMP specific going by the look of the URL.

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    Moderately Underexposed I @ M's Avatar
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    Quote Originally Posted by bigdazzler View Post
    Can anyone help me with a way to correct it ..
    Yep, not only help you but the world financial crisis, which as they tell us can only be cured by spending cash ( lots of it ) by simply buying disgustingly expensive lenses that don't show as much CA.

    Otherwise, just buy any Nikon camera, an everyday Nikkor or Sigma lens and a copy of Capture NX.
    Problem solvered.
    Andrew
    Nikon, Fuji, Nikkor, Sigma, Tamron, Tokina and too many other bits and pieces to list.



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    Quote Originally Posted by I @ M View Post
    Yep, not only help you but the world financial crisis, which as they tell us can only be cured by spending cash ( lots of it ) by simply buying disgustingly expensive lenses that don't show as much CA.

    Otherwise, just buy any Nikon camera, an everyday Nikkor or Sigma lens and a copy of Capture NX.
    Problem solvered.
    Andrew im tempted to respond and type with my keyboard in big capital letters .. " THATS NOT F....EN HELPFUL !! " but becasue I know youre a good bloke, i wont do it ...

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    Member Calxoddity's Avatar
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    Daz,
    If you go to the GIMP download page there's a link for GIMP plugin registry - I'm pretty sure I saw a plugin for CA correction when I was browsing there last week.

    Regards,
    Calx
    Calxoddity
    Concert Pianist, Test Pilot, Pathological Liar


    Nikon D40, Sigma 17-70 F2.8-4.5 HSM, Nikkor AF-D 50mm f1.8
    Post Processing: Aperture 3 & Photoshop Elements 6

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    Moderately Underexposed I @ M's Avatar
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    Sowwy.

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    A royal pain in the bum! arthurking83's Avatar
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    Quote Originally Posted by I @ M View Post
    Yep, not only help you but the world financial crisis, which as they tell us can only be cured by spending cash ( lots of it ) by simply buying disgustingly expensive lenses that don't show as much CA.

    .....
    That URL points to what I reckon may be one of the most enigmatic lenses in the history of lens making!!

    Check out lens numbered SAL500F80!!

    It's weird, possibly great value for money and ambitiously overextending it's capabilities.

    it is of course a 500mm f/8 mirror lens with AutoFocus.
    my experience with these lenses are that they are great value for money(and if the Aussie dollar was more valuable it'd probably sell for much less than what's listed there.
    The issue is that it's stuck at f/8(not an issue in itself), but is Sony leading us to believe that it will actually autofocus even though it's an f/8??
    Most AF systems give up at f/5.6 and by f/6.3 they are all but useless(dependant on light)

    Darren.. it's the only lens in that lineup guaranteed not to CA on 'ya!
    All others can produce (minimal)CA, but the mirror is, by design, going to show less, or none at all!(stuff PPing!! )

    have you got a spare $1699


    And can they pleeeeease make one for Nikon?
    Nikon D800E, D300, D70s
    {Nikon} -> 50/1.2 : 500/8(CPU'd) : 105/2.8VR Micro : 180/2.8ais : 105mm f/1.8ais : 24mm/2ais
    {Sigma}; ->10-20/4-5.6 : 50/1.4 : 12-24/4.5-5.6II : 150-600mm|S
    {Tamron}; -> 17-50/2.8 : 28-75/2.8 : 70-200/2.8 : 300/2.8 SP MF : 24-70/2.8VC


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    Ausphotography Regular wideangle's Avatar
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    A simple but excellent way to often dramatically reduce or get rid of colour fringing can be done by following this tutorial here
    please ask before PP my images

    "Life is what happens to you while your busy making other plans"

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