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  1. #1
    Senior Member

    RAW Colour cast problem

    Having recently upgraded to the D7200, I originally shot a lot of stuff in JPG with no difficulty. However, I'm now switching to RAW (NEF) and have encountered an odd problem. Whenever I download pictures into RAW processing software the images have a very pronounced magenta colour cast. I can get rid of this with some work, but it shouldn't be there, so I'm wondering what causes it.

    I should say that I don't use Windows, having opted (wisely ) to abandon it about eight years ago in favour of Open Souce software. I currently run Linux Mint 17.3 as the OS, with my workflow handled by DigiKam (image processing and cataloguing, similar to Lightroom) and GIMP (an excellent Open Source alternative to Photoshop). In addition to these main applications, I also have a couple of alternative RAW processing programs, but the colour cast problem appears in all of them.

    I have raised this issue with several of the pro's in my camera club, but they are as mystified as I am about what causes this. If anyone has any experience of such a problem, I'd be grateful for any advice on how to fix it.


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  2. #2
    Senior Member
    Danno's Avatar

    Re: RAW Colour cast problem

    First of all, Welcome to the forum. I have a D7200 and shoot in RAW and I have to say that I do not have an issue, but I will say there are a lot of folks here that will be willing to help. The first thing needed will be some example photos with the exif data. Here is a link with instructions. It is important that you stay at 1000 pxls on the long side to retain the exif data. http://nikonites.com/new-member-intr...#axzz45837ujXG
    Dan~~Kentucky

    "The natural man must know in order to believe; The spiritual man must believe in order to know. " ~ Aiden Wilson Tozer ~ "The Dwelling Place of God"

    Nikon D7200 w/Grip, Nikon D700 w/Grip, AF-S Nikkor 200-500mm f/5.6E ED VR, Nikon 14-24 f/2.8, Nikkor 50mm/1.8G, Tamron 28-75, Tamron 70-200 F/2.8
    Yongnuo Speedlight YN568EX, Vanguard ALTA Pro 264AB Tripod, Vanguard
    SBH-100 ball head Beike Gimbal Head, ARCA Swiss B1 ball head

    https://www.dailywalkinthelight.com

  3. #3
    Senior Member

    Re: RAW Colour cast problem

    You can upload a file and a Windows user see if it persists in Windows too.

    Sent from my Nexus 6P

  4. #4
    Senior Member

    Re: RAW Colour cast problem

    RAW Colour cast problem
    Thanks for the fast reply Danno. I've attached a JPG version which is a straight export from the original RAW file, just resized.

    RAW Colour cast problem-test_shot.jpeg

    EXIF Data is embedded.

  5. #5
    Senior Member
    mikew's Avatar

    Re: RAW Colour cast problem

    Welcome to the forum,not a problem i have had but what have you got your w/b set at.
    Mike

    https://www.flickr.com/photos/7239177@N07/

    Nikon D500, Sigma 100-400, Sigma 105 macro, Nikon 18-200

    Nikon 1 V2,FT-1,10-30mm 30-110mm Viltrox extension tubes










  6. #6
    Senior Member

    Re: RAW Colour cast problem

    White balance is set on Auto.

  7. #7
    Senior Member
    Danno's Avatar

    Re: RAW Colour cast problem

    Like Mike I am curious about the white balance, but I see that this is at 8000 ISO and I have seen some strange color noise at high ISO when I have plaid with it that high that could be causing the problem. I like to stay below 3200.
    Dan~~Kentucky

    "The natural man must know in order to believe; The spiritual man must believe in order to know. " ~ Aiden Wilson Tozer ~ "The Dwelling Place of God"

    Nikon D7200 w/Grip, Nikon D700 w/Grip, AF-S Nikkor 200-500mm f/5.6E ED VR, Nikon 14-24 f/2.8, Nikkor 50mm/1.8G, Tamron 28-75, Tamron 70-200 F/2.8
    Yongnuo Speedlight YN568EX, Vanguard ALTA Pro 264AB Tripod, Vanguard
    SBH-100 ball head Beike Gimbal Head, ARCA Swiss B1 ball head

    https://www.dailywalkinthelight.com

  8. #8
    Senior Member

    Re: RAW Colour cast problem

    Yes. I've been shooting in full manual, with Auto ISO which does tend to go high quite often. I'll try a few shots using a lower manual ISO setting.

  9. #9
    Senior Member
    mikew's Avatar

    Re: RAW Colour cast problem

    RAW Colour cast problem
    Is this a bit better

    RAW Colour cast problem-test_shot2.jpg
    Mike

    https://www.flickr.com/photos/7239177@N07/

    Nikon D500, Sigma 100-400, Sigma 105 macro, Nikon 18-200

    Nikon 1 V2,FT-1,10-30mm 30-110mm Viltrox extension tubes










  10. #10
    Senior Member

    Re: RAW Colour cast problem

    That certainly gets the colour balance right in the JPG, which I can do with the original RAW file after some fiddling. Maybe the colour cast is just a natural effect in the RAW files that I'll have to live with.





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