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100mm Square Filter Adapter for Projector Lenses. Parametric — image 1
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100mm Square Filter Adapter for Projector Lenses. Parametric

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Lets you use square filters on projector lenses. Currently setup for a 250mm Buhl lens but the design is parametric.

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Do you have a large lens with no filter threads but want/need to use filters. This model attaches to the barrel of the lens and lets you use one or two 100mm square filters. I believe any brand of 100mm filters.

If you need to re-size this to another barrel size use FreeCAD. Requires the fasteners workbench be installed. Preferences for the fasteners workbench set as 3d printer compatible. In the FreeCAD file just open up the spreadsheet and choose a diamater for the lends barrel.

The fancy screws are simply PC case screws. 6-32. They should be available world wide even in metric countries. Screw them in straight. They may require some lubrication to get the right feel.

If you don't have a 3d printer I'm happy to sell you one at https://www.etsy.com/listing/4409205917/projector-lens-to-100mm-filter-adapter