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Thread: Dynamic range filter

  1. #1
    Senior Member Rawfa's Avatar
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    Dynamic range filter

    Hi,

    When I was working with video Tiffen had a filter called "Ultra Contrast Filter" that allowed "increasing" the dynamic range (ok, in practical terms this is not possible, but it did increased the perception of dynamic range, which was pretty good). Is there something similar for photography?

  2. #2
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    Re: Dynamic range filter

    Rafa,
    Not sure what that Tiffen filter is doing, but increasing the contrast tends to compress the histogram, which actually reduces dynamic range. There may be some other filtering techniques for specific parts of the spectrum (such as IR blocking, etc.) as part of this filter, which could render greater color contrast and separation, thus making things look markedly different and somewhat enhanced, but increasing the contrast tends to reduce the overall dynamic range in an image.

    Secondly, if you like the effects of this sort of filter for what you are shooting, you should be able to use in on your still camera in much the same way it is used on a video camera. Worth experimenting with if you have the opportunity.

    LJ

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    Administrator Bob's Avatar
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    Re: Dynamic range filter

    Actually, I think it works by reducing the contrast.
    The same filter should do the same job in either digital or film photography.
    -bob

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    Re: Dynamic range filter

    That would make sense, Bob, but the naming "Ultra Contrast" is then a misnomer for increased DR ;-)

    LJ

  5. #5
    Oxide Blu
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    Re: Dynamic range filter

    Quote Originally Posted by LJL View Post
    That would make sense, Bob, but the naming "Ultra Contrast" is then a misnomer for increased DR ;-)

    I'm an the last person on the planet that should be offering suggestions about anything that has to do with language, but ...

    ULTRA -- adjective -- going beyond what is usual or ordinary; excessive; extreme.


    It doesn't say which way it is going beyond usual or ordinary; up or down. Perhaps it can also mean the same for increasing as well as decreasing DR?!?

  6. #6
    Senior Member Rawfa's Avatar
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    Re: Dynamic range filter

    Here's the link to Tiffen's web site http://www.tiffen.com/contrast_filters.htm
    There's an explanation there but when you look at the low quality example they have posted there is seems that some how it does allow more detail into the shadows, but it does in no way decreases the blown highlights.

  7. #7
    Subscriber Member Jorgen Udvang's Avatar
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    Re: Dynamic range filter

    That would be interesting to experiment with, although I don't believe there's any such thing as a free lunch. What amazes me endlessly, is how somebody selling high quality photographic equipment can use such crappy images to demonstrate the effect of their gear

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