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  1. #1
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    Histogram Question

    My camera (Rebel XTi) has the option to view the histogram in either RGB mode or for Brightness. What are the advantages/disadvantages for using either of these modes? Which one do you use most often? Thanks for your input.
    tony

  2. #2
    has-been... another view's Avatar
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    Re: Histogram Question

    I have that option with my Fuji S2 as well, but rarely look at anything other than Master (which is probably the same as your Brightness). Individual color channels may be blown out, but to fix that you'd have to either underexpose or change lighting. Some times neither is possible or at least a good option...

  3. #3
    MikiShots mikishots's Avatar
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    Re: Histogram Question

    The brightness selection is fine for in-camera evaluation. Channels are good for working in PhotoShop, but for most people, it's really not advantageous to use it in the camera.

  4. #4
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    Re: Histogram Question

    Thanks! I figured that was the case but wanted some confirmation.
    tony

  5. #5
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    Re: Histogram Question

    Quote Originally Posted by another view
    I have that option with my Fuji S2 as well, but rarely look at anything other than Master (which is probably the same as your Brightness). Individual color channels may be blown out, but to fix that you'd have to either underexpose or change lighting. Some times neither is possible or at least a good option...

    That depends on the body, some newer (Ok, at the moment Pro bodies) cameras are beginning to add a color temp setting that you can adjust the individual colors which really makes it an easy task if you are too low or to high in a particular color in the histogram. It won't be long long before this hits lower end units as well.

    JS
    Canon 1D
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    Canon 70-200mm USM IS f2.8
    Canon 200mm f1.8 USM
    Canon 300mm f2.8 USM IS
    Canon 28-300mm USM IS f3.5-5.6
    Canon 50mm f1.8
    Vivitar 19-35mm f3.5-5.6

  6. #6
    Sleep is optional Sebastian's Avatar
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    Re: Histogram Question

    It's just another tool. It can be interpreted just like a brightness histogram, but gives you additional info. For example, it might tell you that you are totally blowing out red. If you're shooting roses, that might matter to you, and you might miss it in the brightness histogram.

    If I had the option to use it, it'd be on all the time. You have to remember, any histogram is only as valuable as you make it.
    -Seb

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  7. #7
    has-been... another view's Avatar
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    Re: Histogram Question

    JS, haven't the Nikon DSLR's done this? At least what I'm thinking of, which is selecting a color temperature (number, like 5000K) from a setup menu? I suppose from there if the reds are being blown you could raise the CCT so you don't blow it at time of capture, then bring the WB back down with your RAW converter? Or do I have this all wrong...? Sounds interesting!

  8. #8
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    Re: Histogram Question

    No, this allows you to change the white balance of specific colors, specifically B(lue) A(mber) M(agenta) G(reen). This allows a whole lot more color control than the standard WB.

    JS
    Canon 1D
    Canon 1D MK II N
    Canon 70-200mm USM IS f2.8
    Canon 200mm f1.8 USM
    Canon 300mm f2.8 USM IS
    Canon 28-300mm USM IS f3.5-5.6
    Canon 50mm f1.8
    Vivitar 19-35mm f3.5-5.6

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