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Thread: LF Masking Chroma Key Wet Prints

  1. #1
    Tin Can's Avatar
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    LF Masking Chroma Key Wet Prints

    Recent discussion about making color with B&W film made me think of trying Chroma Key with LF B&W film

    Seems it has a long history https://www.36pix.com/blog-the-histo...chroma-keying/

    Since i have a Blue backdrop, I could easily try LF masking in studio shots

    Any thoughts, any suggestions on how to start?

    What lens filter should I use with a blue background?

    I want to do this all in DR with only B&W film and paper, perhaps background projection

    No digital, no Photoshop manipulation allowed
    Tin Can

  2. #2
    Tin Can's Avatar
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    Re: LF Masking Chroma Key Wet Prints

    Perhaps too obvious to many

    More brain cells activated, what I want is totally clear backgrounds on my first neg, which means full dark background

    Then interneg to block primary subject...
    Tin Can

  3. #3

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    Re: LF Masking Chroma Key Wet Prints

    Star Wars! The pinnacle of blue-screen at the time. American Cinematographer had good write ups. I still have my copy in storage somewhere. Motion picture special effects literature at the time should get you somewhere. Also this type of “hold back” was used in titles, often with b&w stock so look into that as well. Sounds fun

  4. #4
    C. D. Keth's Avatar
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    Re: LF Masking Chroma Key Wet Prints

    Separation, spacially speaking, of your subject from the key background is the best way to ensure clean masks. Rim lighting helps if you have to place the person (object, whatever) too close to the background. Beyond that you just need very, very even lighting on the background. Keep it on the low side, zone 5ish, to be sure that there is really strong color saturation.

    I could lend one of my copies of "The American Cinematographer's Manual" if you'd like.
    -Chris

  5. #5
    Tin Can's Avatar
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    Re: LF Masking Chroma Key Wet Prints

    Thank you!

    I see I can buy a used 7th edition 1996 for $5 delivered

    That should be good enough?




    Quote Originally Posted by C. D. Keth View Post
    Separation, spacially speaking, of your subject from the key background is the best way to ensure clean masks. Rim lighting helps if you have to place the person (object, whatever) too close to the background. Beyond that you just need very, very even lighting on the background. Keep it on the low side, zone 5ish, to be sure that there is really strong color saturation.

    I could lend one of my copies of "The American Cinematographer's Manual" if you'd like.
    Tin Can

  6. #6
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    Re: LF Masking Chroma Key Wet Prints

    When i lived in Chicago I often watched LIVE ABC news and saw them go to LED Chroma Key with robot cameras

    Interesting to see from outside, they often send a camera and crew out to interview the crowd

    They make it look easy

    https://www.esdglobal.com/gallery/pr...-studio-wls-tv
    Tin Can

  7. #7
    C. D. Keth's Avatar
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    Re: LF Masking Chroma Key Wet Prints

    Quote Originally Posted by Tin Can View Post
    Thank you!

    I see I can buy a used 7th edition 1996 for $5 delivered

    That should be good enough?
    Yeah, that should have lots of information on chroma keying.
    -Chris

  8. #8
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    Re: LF Masking Chroma Key Wet Prints

    Good, I have some experience with documentaries, even had a couple IMDB credits that were later removed...

    I will buy the book

    Quote Originally Posted by C. D. Keth View Post
    Yeah, that should have lots of information on chroma keying.
    Tin Can

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