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Thread: Purple Fringing, how to prevent during shoot or reduce in CS3?

  1. #1
    Member psccy's Avatar
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    Default Purple Fringing, how to prevent during shoot or reduce in CS3?

    Hi guys...

    Trying out shooting some stills over the weekend.

    Had some issue with purple fringing with my A100.

    A100, Minolta 75-200mm @ 135mm, F/11, 1.6sec, ISO100

    How can I prevent it during the shooting process?
    How can it reduce of remove it during postprocessing in CS3?
    Last edited by psccy; 23rd October 2007 at 01:41 PM.
    Sony α850 / Sony α100 IR
    Quiet please... Let the picture tell its story.

  2. #2

    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    To prevent it: shoot at smaller apertures or buy better lenses

    To remove it: Look in the "digital darkroom" forum category, there are detailed steps and pre-made anti-CA filter plugins available.
    Alpha

  3. #3

    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    i think rashkae mostly told u how to prevent it. try going to photozone.de to find out abt CAs on ur lens. can be reduced by stopping down the aperture, and also by using certain focal lengths, the CAs will be less
    (cant find the review for ur lens, but there will be reviews for other lenses)

    in photoshop, try going to filters, distorts and then lens correction. there will be an option to remove fringing (by colouring it a contrasting colour). never tried it before, but i think it shld work

    however the 1st point is not true for all lenses, e.g.: http://www.photozone.de/8Reviews/len...0_28/index.htm
    the CAs are worse towards f/8 and the extreme focal lengths, 80mm and 200mm for the nikon 80-200 f/2.8 (scroll down to almost the bottom for a chart)

  4. #4

    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    Quote Originally Posted by 2.8photography View Post
    however the 1st point is not true for all lenses, e.g.: http://www.photozone.de/8Reviews/len...0_28/index.htm
    the CAs are worse towards f/8 and the extreme focal lengths, 80mm and 200mm for the nikon 80-200 f/2.8 (scroll down to almost the bottom for a chart)
    Agreed. The majority of lenses are "ok" once you reduce the aperture though.
    Alpha

  5. #5

    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    If u shot in RAW, then when using Adobe Camera Raw, there is an option to remove or at least reduce fringing and vignetting.

  6. #6
    Member psccy's Avatar
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    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    Thanks everyone!

    When you mentioned to step down the aperture, does that mean I need to go from F/11 to F/22 or to F/8?
    Sony α850 / Sony α100 IR
    Quiet please... Let the picture tell its story.

  7. #7

    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    go to smaller aperture. not bigger.

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    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    Quote Originally Posted by psccy View Post
    Thanks everyone!

    When you mentioned to step down the aperture, does that mean I need to go from F/11 to F/22 or to F/8?
    go from F11 to smaller aperture means the number must be greater than F11, such as F16 or F22. but also dun go too small as diffraction may occurs
    http://www.dreamstime.com/Ionsoon_info
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    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    OT abit, is that purple fringing considered as chromatic aberrations?
    http://www.dreamstime.com/Ionsoon_info
    So much Creativity So much Technology

  10. #10
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    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    yes i believe.

    under postprocessing in raw window u can go to lens correction, adjust the hues of the colours u want but it will be quite minimal only..

    i had a shot with fringing and i converted to b&w..tada...fringing gone and u get a nice sharp picture haha but of course its subjective to what picture suits a black and white more la

  11. #11

    Default Re: Purple Fringing, how to prevent during shoot or reduce in CS3?

    Quote Originally Posted by IONSOON View Post
    OT abit, is that purple fringing considered as chromatic aberrations?
    Yes, same thing.
    Alpha

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