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aperture reducer

Discussion in 'Wiki' started by derekleffew, Apr 17, 2008.

  1. derekleffew

    derekleffew Resident Curmudgeon Senior Team Premium Member

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    Las Vegas, NV, USA
    Used instead of an iris in an ERS to reduce the size of the beam but still maintain a circular shape. Easily fabricated from sheet metal. Make the outer dimensions the same size as a standard pattern holder, and make many with various sized holes from which to choose during focus. Certainly not as flexible as a drop-in iris, but certainly less expensive. Alternatively, an appropriately sized gobo may be purchased from many sources. Link to one manufacturer's offerings.


    Attached is a Microsoft Excel workbook file to aid in image sizing for Source Four ERS fixtures: View attachment .

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    Last edited: Sep 30, 2008

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