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High contrast purple fringing.

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    xinia
    xinia  954 forum posts
    23 Jan 2006 - 9:55 AM

    Just wondering how much purple fringing is due to the camera or lens. Have noticed it with the nikon d70 and the kit lens(now deceased) and also with the recent purchase of the fairly 'basic' sigma 18-200mm lens. Not being able to try it out with top top lenses just wondered if the prob. would cease to be so if using them? Any thoughts ???

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    aftertherain
    23 Jan 2006 - 11:06 AM

    I use the Nikon D70 with the 18-70 & 28-200 lens and I only get fringing if I seriously oversharpen my images in PS.

    u08mcb
    u08mcb  105817 forum posts
    23 Jan 2006 - 11:16 AM

    Purple fringing is a fault associated with the lens and cannot be caused by sharpening in PS.

    martyn_b
    martyn_b  81 Constructive Critique Points
    23 Jan 2006 - 11:21 AM

    i too get purple fringing sometimes,70-300nikon DG lens with the D70S a friend said you should be able to alter it in the settings but i havent found out how yet, cheers martyn

    User_Removed
    23 Jan 2006 - 11:29 AM

    Agree with Merl's comments when it comes to the 18-70mm... and I have to disagree slightly Malcolm. Sharpening will exacerbate the problem. In this full size image, the radiator had a hint of 'PF in the top, left portion. Sharpening made the PF worse. (File size was 72Mb...)

    takui neko
    takui neko  10849 forum posts Spain11 Constructive Critique Points
    23 Jan 2006 - 11:33 AM

    Exacerbate yes, cause it, no. Smile

    u08mcb
    u08mcb  105817 forum posts
    23 Jan 2006 - 11:34 AM

    oversharpening anything will make it look rubbish but i challenge you to provide evidence that sharpening can actually cause purple fringing to increase.

    loweskid
    loweskid  122042 forum posts United Kingdom1 Constructive Critique Points
    23 Jan 2006 - 11:56 AM


    Quote: Not being able to try it out with top lenses just wondered if the prob. would cease to be so if using them?

    Not necessarily. One reason (apart from cost) I bought the Sigma 12-24 in preference to the Nikon was less chromatic aberration. Someone on dpreview had managed to borrow both lenses for a day and took a lot of comparison shots.

    If you are shooting in raw and using the Adobe Camera Raw plug-in for Photoshop there are two sliders where you can adjust the amount of fringing.

    xinia
    xinia  954 forum posts
    24 Jan 2006 - 1:35 AM

    thanks - Vincent thats an interesting point about shooting in Raw...... and being able to adjust the PF.

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