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  1. #1
    athanasius80's Avatar
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    Piece of blue glass on a string?

    I was just going through an old LF setup I bought off of e_ay and found a piece of deep blue glass not quite 2" in diamater hanging from a string. Its just a piece of glass. I've stumbled across these before and I'm wondering if people used these for metering before modern light meters.
    Any ideas?
    Thanks!

  2. #2
    David A. Goldfarb's Avatar
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    That's probably a monochrome viewing filter. Zone VI sold one. The idea is that you can look through the filter to get a better idea of the tonal relationships that B&W film sees.

    P.S.--it's okay to say "eBay" here.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  3. #3
    glbeas's Avatar
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    Actually they are used for helping to visualise the scene in B&W. This works to show it like blue sensitive film will see it
    Gary Beasley



 

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