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Thread: In-camera white balance meter

  1. #1
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    Default In-camera white balance meter

    I tried to find the answer to this, but so far I can't find it.

    Why there is no built-in white balance meter in a professional DSLR? I understand that the cost are too high for an entry level DSLR, but how about putting it in a high-end pro DSLR? It sure helps alot!

  2. #2
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    Default Re: In-camera white balance meter

    Quote Originally Posted by voldisinarta View Post
    Why there is no built-in white balance meter in a professional DSLR?
    Using the image sensor to determine white balance is inherently the most accurate method.

  3. #3

    Default Re: In-camera white balance meter

    what abt WB sensors on the external body??

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    Default Re: In-camera white balance meter

    Quote Originally Posted by ozkid88 View Post
    what abt WB sensors on the external body??
    What use would that be?

  5. #5
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    Default Re: In-camera white balance meter

    most digital cameras are able to do custom WB, why you still the the camera tell you to use how many CC and how many CC filters on your camera lens?
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  6. #6

    Default Re: In-camera white balance meter

    Quote Originally Posted by LittleWolf View Post
    What use would that be?
    of coz theres a use right! if not y do some(or is it all?) professional bodies have it? has to serve a purpose like making the WB more accurate?

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    Default Re: In-camera white balance meter

    Quote Originally Posted by ozkid88 View Post
    of coz theres a use right! if not y do some(or is it all?) professional bodies have it? has to serve a purpose like making the WB more accurate?
    I'm not aware that any "professional body" (whatever that means) has a "white balance meter". You can try to measure the spectrum of the illuminating light, or a crude approximation of it like colour temperature, but you would have to take the reading at the location of the object to be photographed, not the location of the camera (which is why integrating it in the camera doesn't make much sense).

    However, this information by itself isn't too helpful. White balance is a device dependent relative adjustment (the relative gains, be it in hardware or in software, of the different colour channels), which depends on the characteristic of the sensor, readout electronics after it, and optics in front of it. The most reliable, simple, and accurate way to take all these factors into account is to use the very same optics/sensor/electronics and a colour neutral reflective reference target (or diffuser), which is the prevailing practice. Also, due to metamerism, you won't get "accurate" colours anyway.

    Maybe the following could be helpful:

    http://en.wikipedia.org/wiki/White_point
    http://en.wikipedia.org/wiki/Color_temperature
    http://en.wikipedia.org/wiki/White_balance

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