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Thread: Would a magenta filter work for increasing contrast...

  1. #1
    Steven Ruttenberg's Avatar
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    Would a magenta filter work for increasing contrast...

    ...when taking bw image? Use it in place of say the red25A filter? Just curious.

  2. #2
    Gary Beasley's Avatar
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    Re: Would a magenta filter work for increasing contrast...

    It would darken the green colors. Any color filter removes its opposite color on the color wheel. A flourescent color correcting filter is magenta to reduce the greenish cast flourescents produce on color film.

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    Re: Would a magenta filter work for increasing contrast...

    It depends on subject's color, if your subject is green then it will darken the subject in the image, rather than increasing contrast.

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    Steven Ruttenberg's Avatar
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    Re: Would a magenta filter work for increasing contrast...

    True, I was just curious since magenta is used for contrast in printing or so I am told.

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    Re: Would a magenta filter work for increasing contrast...

    Quote Originally Posted by Steven Ruttenberg View Post
    True, I was just curious since magenta is used for contrast in printing or so I am told.
    That is because of the sensitivity of the paper emulsion. That is not the same as a film emulsion.

  6. #6
    Steven Ruttenberg's Avatar
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    Re: Would a magenta filter work for increasing contrast...

    Ok.

  7. #7
    Thalmees's Avatar
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    Re: Would a magenta filter work for increasing contrast...

    Quote Originally Posted by Steven Ruttenberg View Post
    ...
    Use it in place of say the red25A filter?
    ...
    For Pan films, I do not think it will replace(in effect) true Orange or even 21Orange, let alone the Red.
    It will not act like photography filters.
    For paper negative, I think it will do its job like in darkroom.

    The generosity of spirit in this forum is great, its warmly appreciated.
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  8. #8
    Steven Ruttenberg's Avatar
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    Re: Would a magenta filter work for increasing contrast...

    Sounds good.

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    Gary Beasley's Avatar
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    Re: Would a magenta filter work for increasing contrast...

    It would be good if you wanted to darken green foliage without excessively darkening skin tones or sky tones as it passes both those colors.

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    Re: Would a magenta filter work for increasing contrast...

    Quote Originally Posted by Steven Ruttenberg View Post
    ...when taking bw image? Use it in place of say the red25A filter? Just curious.
    One big problem you would face is finding an optical quality one.

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