David,
Instead of using plastic materials for the rails, I would recommend
using the 1/4" brass angles available in hobby shops. They are
straight and have rigidity. Just spray paint it matte black. I've
used them with great success.
Sam Wang
>I want convert an existing old camera (122 Format) to
>use 120 roll film. I've figured out how to create an
>extension the the shorter spool. But I need a piece
>of very thin mat black, rigid material. To cut a mask
>to support the smaller film size. I don't know the
>proper name for this piece.
>Does anyone know where I could find thin rigid
>plastic? The reason I say plastic is I figure it
>would already be black, and be easy to work with.
>Thank you,
>David
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