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Thread: CFV photos green tint problem?

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    CFV photos green tint problem?

    Hello!

    Using a Cfv with 500cm, I usually take my photos with daylight white balance in sunny days, the concern is that I find all my photos really shifted into green tones, I have to switch to magenta on each shots !

    Is it a kown issue with hasselblads digitL backs? Is there a way to get a better calibration of the tint by default?

    Thanks!

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    Re: CFV photos green tint problem?

    I have a cfv39 and have no issues. Is your monitor profiled? What software to convert your raw? Never seen any green cast or cast of any sort. Do you see a shift with other cameras? Can you check you'd files on another computer? Have you printed any?

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    Re: CFV photos green tint problem?

    Possible causes based on my own experience:

    1) Lens shutter;
    2) Sync cable;
    3) Incorrect digital back settings.

    Also, not sure if this could be helpful: ALPA of Switzerland - Manufacturers of remarkable cameras - Can I use my Hasselblad/Imacon digital back with the ALPA?

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    Member Douglas Fairbank's Avatar
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    Re: CFV photos green tint problem?

    I guess you have checked that you actually do have Daylight selected on your back!? Is a different colour balance being applied during the import process. For example if you were importing using Phocus is the 'Standard' adjustment in place during the import, the default for Phocus is to retain the adjustment from the previous session.

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    Senior Member johnnygoesdigital's Avatar
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    Re: CFV photos green tint problem?

    I also had the green tint...make sure you're not putting any pressure on the shutter release until you're ready to take a shot. Sometimes the DB can be "charged" by slightly pressing the shutter, thus a few green frames. I think the slight pressure on the shutter pushes the camera pins slightly into the DB and turns it on...so to speak. Also make sure the settings on the DB menus are set correctly. This is a great DB, and many love it, have fun.

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    Senior Member atanabe's Avatar
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    Re: CFV photos green tint problem?

    Green tint sounds like a sync issue.

    1) Check to see that you have set the correct camera from the menu selection.
    2) Check the back capture time is it <1/8 and is your shutter speed capture 1/8 or less (faster)? If you are shooting at a longer shutter speed, 1/4 or longer and the back is set to capture <1/8 then a color cast may result.

    If you still have the color cast try selecting the sync capture from the menu of camera types, use the x sync cable to the back and lens and try that.

    Johnny also had a good point of not "riding the shutter release" as the pin protrudes to the CFV and wakes it up starting the capture sequence.

    -Al
    Al Tanabe my website https://www.altanabe.com

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    Re: CFV photos green tint problem?

    Hello guys,

    Thanks a lot for the help.
    The green shift is not like a screen color, or a shutter problem, but more loke a bad tint value...
    When I shoot landscapes for instance, the vegetation is way too Green!
    WB looks fine, but I allways have to move to magenta values in LR or phocus. The default import is neutral.

    Any ideas? Thanks!

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    Senior Member atanabe's Avatar
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    Re: CFV photos green tint problem?

    If you tried all of the suggestions I made earlier, then it is time to get service involved. Go to the Hasselblad website and put an inquiry for service via email. They usually respond within 24 hours and can have you try several other things such as software reloads. If that does not work the next step is to send it in for service. Turn around time from the US is about three weeks.
    Al Tanabe my website https://www.altanabe.com

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    Senior Member Steve Hendrix's Avatar
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    Re: CFV photos green tint problem?

    Quote Originally Posted by elrafo View Post
    Hello guys,

    Thanks a lot for the help.
    The green shift is not like a screen color, or a shutter problem, but more loke a bad tint value...
    When I shoot landscapes for instance, the vegetation is way too Green!
    WB looks fine, but I allways have to move to magenta values in LR or phocus. The default import is neutral.

    Any ideas? Thanks!

    What happens when you have captured a spectrally neutral grey card in a scene and white balanced in Phocus? Is it still tinted green?


    Steve Hendrix
    Capture Integration
    Steve Hendrix, Sales Manager, www.captureintegration.com (e-mail Me)
    Digital Cam: Phase One | Leaf | Leica | Sinar Authorized Reseller
    TechCam: Alpa | Cambo | Arca Swiss | Sinar Authorized Reseller

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    Re: CFV photos green tint problem?

    Hello Steve,

    I should try the neutral grey,

    the strange stuff is that colors seems ok when I do an import in LR, but when I select the image, the rendered picture switches automatically to a green tint, like if a profile was automatically applied.

    same in the preview on my mac, the thumbnails look ok in terms of value and color, but when I hit the space bar, the previewed version switches to green tones.

    this is not a major problem as I can sill color correct in photoshop or LR, Phocus, but its a bit annoying when I try to get the colors right.

    looks like an embedded color value

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    Re: CFV photos green tint problem?

    Hello guys,

    looks like a color balance problem... I can solve it in LR only but not in Phocus, color picking a white or neutral grey, even using Auto mode will correct my strange green and cyan tones...
    I don't get why it is so hard for me to put the right values in phocus but LR seems to solve a big part of the problem!

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    Member Douglas Fairbank's Avatar
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    Re: CFV photos green tint problem?

    Elrafo, it does sound like some colour balance/correction is being applied, why not ask your local Hasselblad people to look at one of your 3FR and FFF images to see where and how it is happening. Please see the list below of what I think may be the problem.
    1. Colour balance setting on the back at point of exposure
    2. Colour correction from a previous session in Phocus is still active and being applied
    3. Very unlikely to be the problem but please check you have the latest Phocus and the latest firmware installed on the back, maybe even reload the firmware to be sure. Even less likely is the prefs files have become corrupted.
    4. Check the Input Profile is Hasselblad RGB in the Reproduction window of Phocus, you may need to add this to the default tool set by using the pull down menu of all available tools above the tool set. Check the Phocus Manual.

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    Re: CFV photos green tint problem?

    You might make a 3fff file available to some of the forum members to try. Would be interesting to see if our files respond the same on your computer.

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    Re: CFV photos green tint problem?

    hello guys, sorry for the delay, here are some files maybe you can check ? the strange stuff is that there is a color profile applied on the image, which make them switch to green values.

    by default on my Mac browser, the color seems right, as soon as I press space bar, looks like a color profile is applied and I see "green" ...

    Index of /cgforum/CFV

    thanks!

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    Member Douglas Fairbank's Avatar
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    Re: CFV photos green tint problem?

    I notice that your 'Lofoten' image has an adjustment applied, white balance is 4850 plus a tint of 10. Was this adjustment applied during import or post import. A standard adjustment applied to the imported raw image (A1214011) seems much more natural. Applying the neutralization tool to grey sunlight rocks seems to apply a close to daylight value (5300) and applying the same tool to a shadowed rock applies a close to shade value (7250).

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    Re: CFV photos green tint problem?

    Thank you Douglas,

    do you figure out why this adjustment is applied in LR and Phocus ? is is embedded in the Raw file ?

    thanks!

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    Member Douglas Fairbank's Avatar
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    Re: CFV photos green tint problem?

    As I said earlier I suspect that the adjustment is being applied during the import process into Phocus. When you import check that the adjustment in the import prefs window says 'Standard'. The adjustment will be embedded in the raw file and Lightroom will be reading this, I am no expert with Lightroom and I don't know if you can deselect the embedded profile, maybe somebody else reading this may be able to offer a suggestion.
    However if you apply 'Standard' adjustment to your images and modify (save) the images so the adjustment is embedded you should be able to see the standard adjustment in Lightroom as well, but it might only effect the thumbnail in Lightroom.

    Maybe I could take this opportunity to ask a question of my own, if you have made a change to an image outside of Lightroom how do you refresh the Lightroom image, or do you have to delete it and re-import it?

    To be honest, I use Lightroom because I have to, not because I like it!
    Last edited by Douglas Fairbank; 5th September 2012 at 06:38.

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    Re: CFV photos green tint problem?

    Quote Originally Posted by Douglas Fairbank View Post
    Maybe I could take this opportunity to ask a question of my own, if you have made a change to an image outside of Lightroom how do you refresh the Lightroom image, or do you have to delete it and re-import it?
    I often call Photoshop from Lightroom to make some adjustments and when I save the image and return to Lightroom all changes are there automatically - don't need to re-import or even reload the image.

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    Member Douglas Fairbank's Avatar
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    Re: CFV photos green tint problem?

    Yes I see now that in the case of a jpg image for example the thumbnail may not be instantly updated from an external (non Photoshop) change but is updated when moving into 'Develop'.
    In the case of the fff image Lightroom will be looking at the raw image and not applying the adjustment as Phocus would.
    I need more practice in moving between Phocus and Lightroom.

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    Member Paul Claesson Hasselblad's Avatar
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    Re: CFV photos green tint problem?

    Hello Elrafo,

    I looked at the images.
    Please make sure that the firmware installed in the CFV16 is R267.
    You can find this here: Menu > Settings > About > Firmware revision

    Steve was kind enough to offer his comments " What happens when you have captured a spectrally neutral grey card in a scene and white balanced in Phocus? Is it still tinted green?" Thank you Steve, this was my first thought when read this thread.

    You do have 7 options in the Menu under "White Balance"

    - Manual (user sets Kelvin temperature)
    - Daylight
    - Tungsten
    - Fluorescent
    - Flash
    - Shade
    - Cloudy

    I have used the CFV quite a bit in years past. I always made the first capture on location of either a Greytag Macbeth Color checker or an Xrite Passport in the scene and I would set the camera to "Daylight".

    I would then import one image, neutralized it, apply a small of unsharp mask - 125 in a 16mp should do, I would make a curves adjustment if I thought it necessary and then I selected all images in a batch and modify all selected images. I would then review and tag my final selects and make adjustments on individual images if needed.

    I hope this helps.
    Paul Claesson
    Technical Support Manager
    Hasselblad Bron Inc.

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    Member Paul Claesson Hasselblad's Avatar
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    Re: CFV photos green tint problem?

    What version of Lightroom are you using?
    Paul Claesson
    Technical Support Manager
    Hasselblad Bron Inc.

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    Re: CFV photos green tint problem?

    Hello Paul,

    I have R267 release indeed.

    LR, version 4, as said, picking up a neutral grey with LR will solve the problem, with Phocus, the process seems more complicated...there is no color picker...

    I will shoot a neutral grey and let you know, thanks for the advice,


    Raph

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    Member Miller's Avatar
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    Re: CFV photos green tint problem?

    Quote Originally Posted by elrafo View Post

    LR, version 4, as said, picking up a neutral grey with LR will solve the problem, with Phocus, the process seems more complicated...there is no color picker...
    Raph,

    In Phocus, you will find the neutralizer tool (a color picker) in the toolbar, next to the straighten tool
    Try it on the shot of a grey card

    Frans Rutten

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    Re: CFV photos green tint problem?

    rhooo Miller you made my day

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    Member Miller's Avatar
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    Re: CFV photos green tint problem?

    OK Raph,

    Enjoy the ride. From here on things will get better.
    Seriously, Phocus can be a bit of a pain, but once you get the hang of it, it can perform magic on your files.
    Files that look like sh#t after import with the standard profile, will look great after setting blackpoint and whitepoint and applying a bit of curve.
    Have fun.

    Frans Rutten

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