Preset White Balance and Cards

Discussion in 'Digital Discussion & Q&A' started by iflynething, Sep 5, 2008.

  1. iflynething

    iflynething TPF Noob!

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    I have never got the grasp of shooting a preset white balance. It's hard to get a card or something white to take the picture of without a shadow or something, which I think is going to throw the camera off.

    What is the correct way to make a preset white balance from shotting a white card or something white?

    ~Michael~
     
  2. Garbz

    Garbz No longer a newbie, moving up!

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    Well that's the point of the card. If you're trying to get correct white in the shadow then shadow the card. The card will take the colour of the light that falls on it, so if you have it out in the sun anything else that gets hit by the sunlight + skylight (daylight this is called) will be white. If you put in in the shade then you will only get skylight (shade setting), so that light will look white and the sunlight will look very orange.
     
  3. iflynething

    iflynething TPF Noob!

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    Hmm......Thanks for the quick response. That makes enough sense. I might just get an Expo Disc :) I don't wanna open a can of worms but are they better than white a grey cards

    ~Michael~
     
  4. gryphonslair99

    gryphonslair99 Been spending a lot of time on here!

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    I have never used the Expo disc so I can't comment on how well it works. I use this.
    Lastolite

    It is a white balance card on one side and an 18% gray card on the other. It has worked well for me.
     
  5. iflynething

    iflynething TPF Noob!

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    I hope it folds down :)

    ~Michael~
     
  6. gryphonslair99

    gryphonslair99 Been spending a lot of time on here!

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    Here are the basic features :)

    1. Colour correction pre and post capture.
    2. Exposure control pre and post capture.
    3. Accurate colour rendition.
    4. Collapsible, durable, and cleanable.
    5. Double sided grey and white.
    6. Unique focusing site.
    7. For use with digital or film photography.
    It collapses or folds like a reflector to about 1/3 or 1/4 its size and comes with it's own pouch.
     
  7. iflynething

    iflynething TPF Noob!

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    That's pretty nifty. How can 18% gray measure the white balance. How can measuring what 18% grey is and 100% white is be the same and get the same results from each card or does the grey and white side measure differently?

    ~Michael~
     
  8. Bifurcator

    Bifurcator TPF Noob!

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    Grey is for exposure, white is for WB. I carry one of each in my wallet. CC sized. In my case it's thick colored plastic so once every 2 years or so I can just lightly sand them down and get back their original color. I think I've been carrying this particular pair for about 20 years. ;)
     
  9. gryphonslair99

    gryphonslair99 Been spending a lot of time on here!

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    Sorry, I missed this. I use the white side to set a custom white balance in the camera. Then the first shot I take is of the gray side. 18% gray is neutral. This is what I use to make in minor color corrections in post processing. Usually I only use this when shooting indoor sports in a gym that is mainly light by florescent lighting. The color shift in the place is terrible.
     
  10. Josh66

    Josh66 Been spending a lot of time on here!

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    I use a WhiBal card, it has 3 colors on it - grey, white, and black.

    The grey part is used for white balance, not exposure (though I think you could use it for that too). The white and black parts are supposed to be used to set your white and black points (I think that's only needed if you're shooting JPG). They say that you shouldn't use the white part because it will get clipped sometimes, making it useless as a white balance referance.

    They have some tutorial videos on there too that explain it all. Watch the third video for the explanation of why you use the grey part for white balance.

    I just take a picture of it when I want to make sure I get the white balance right, then use the white balance tool in Lightroom on it.
     
  11. iflynething

    iflynething TPF Noob!

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    Well then. i never knew that. Thanks for sharing. I will have to invest in one then.

    ~Michael~
     

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